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"M" Slang

Slang words starting with "m" — clear definitions, real examples and origins. Updated as new slang appears, and free to browse with no sign-up.

"M" Terms

monetize
General
To turn an asset, audience, or activity into a source of income.
money bag
Street
A wealthy person or someone who has a lot of money.
money makers
General
What linemen call their pole-climbing hooks — the steel gaffs and leg irons that strap to their boots and bite into wood poles. No hooks, no climb, no paycheck — hence the name. Treated like sacred kit; you don't borrow another lineman's money makers.
money printer go brrr
Internet
'Money printer go brrr' mocks the Federal Reserve's large-scale money creation and asset purchases, implying that stimulus mechanically props up asset prices. The 'brrr' is the printer's sound.
moneymaxxing
Internet
Going all-in on optimizing your finances — aggressive saving, budgeting apps, side hustles, cutting every non-essential cost — often turned into short-form video content.
mongo
General
A pushing style in which the rider keeps the back foot on the board and pushes with the front foot; widely considered awkward or incorrect form by many skaters. Short for 'mongo-foot.'
mongrel
General
A nasty or despicable person; separately, 'mongrel' can mean aggressive competitive spirit ('a bit of mongrel').
monkas
Gaming
Marks a cringe or risky social moment in stream where something could go badly wrong.
monkaw
Gaming
When a moment is unbearably tense, chat reaches past monkaS for monkaW. The tighter crop sells the panic.
monkey
Street
London money slang for five hundred pounds.
monkey dish
General
Small round dish — usually 3 to 5 inches — used for ramekin-style portions: dipping sauces, nuts, olives, side of slaw, lemon wedges. A staple piece of restaurant smallware. Origin is murky but the name's been kicking around the trade for over a century.
monkey hanger
General
A person from Hartlepool, from the local legend of hanging a monkey as a French spy.
monkey-barring
Internet
Used to call out overlapping relationships that feel like cheating.
monkey's blood
General
The sweet red fruit sauce squirted over an ice cream cornet.
monkeying
Internet
Leaving one relationship only after securing the next, never being single in between, like a monkey swinging branch to branch. Also called 'monkey-barring.'
monstruo
General
A 'beast' or 'monster' — someone extremely good at what they do.
mooch
General
To browse aimlessly, drift around — most often round the shops with no intention of buying anything. Pure killing-time energy. Used across the UK but a Brummie staple.
mook
General
Someone timid, gullible or seen as a pushover.
moon
Internet
A massive, often parabolic price increase. The asset isn't just going up — it's leaving the atmosphere. Usually paired with rocket emojis and a complete loss of analytical perspective. 'When moon?' is the eternal cope-question of every bagholder.
moon rocks
Street
Extremely potent cannabis made by dipping flower in hash oil and dusting it with kief.
moonbag
Internet
After a coin pumps, you sell enough to recoup your initial investment and leave a smaller stack riding 'for the moon'. House money. If it goes to zero you don't care; if it 100x's you're a genius. The disciplined degen's compromise.
moonbeam
General
Marine Corps term for a handheld flashlight.
moonboi
Internet
A playful respelling of "moonboy," an over-eager believer that a coin's price is about to explode upward.
moonboy
Internet
Mildly derogatory term for someone who only ever predicts prices going up, ignores fundamentals, and treats every dip as a buying opportunity right before it gets dippier. Often a YouTuber with a thumbnail of themselves pointing at a green arrow.
moongirl
Internet
A relentlessly bullish person (female-coded counterpart to "moonboy") convinced a coin's price will surge dramatically.
mooning
Internet
Describes an asset undergoing a strong, sustained upward price move.
moonlighting
General
Holding a second job in addition to one's regular employment, frequently done in the evenings and sometimes concealed from the primary employer.
moonwalking
Gaming
Lightly tilt the stick back during the dash and your character glides backward at dash speed while still facing forward, just like the dance. It lets you retreat and still threaten a forward grab from the wrong direction.
moots
Internet
Your follow-back crew — accounts you follow who follow you back. Carries warmth: moots are the soft inner ring of an online life, the ones you reply to without thinking. 'Moot' singular = one specific one, usually a friend you've never met IRL.
mop
Street
A large gun, typically a rifle or a pistol with an extended mag — long enough to look like a mop handle when you're holding it. Drill-scene visual joke that stuck. If a rapper says he's bringing the mop out, he isn't cleaning the floor.
mop-up
General
The final phase of a wildland fire: walking the cooled black inside the containment line, digging up smoldering stumps and root systems, stirring ash piles, and drowning every last hot spot so nothing creeps back across the line and restarts the fire. Days of cold, wet, sooty work with a piss-pump and a hand tool — no glory, all grind. The structural equivalent is called "overhaul."
mopping
Pop
Used historically and in documentaries to describe survival-driven theft within the scene.
morally grey
Internet
The BookTok shorthand for a hero who'll do bad things for the right reasons — or sometimes the wrong ones. Not a cinnamon roll, not a full villain, just unsettlingly hot and unpredictable. The whole genre runs on him.
more than you can shake a stick at
General
An abundance—so many you couldn't point them all out.
more time
General
A relaxed way of saying goodbye / 'catch you another time'.
more to follow
General
A procedure word signalling that the transmitting station has more messages to send to the receiving station, so the receiver should keep listening.
morfa
General
A low-lying coastal wetland — salt marsh, fen, or tidal flat — that the sea floods periodically. The word literally means 'sea-place' (môr + fa). You'll see it stitched into Welsh place names all along the coast: Morfa Conwy, Morfa Nefyn, Morfa Bychan.
morfar
General
To eat, to scoff food. The source traces to French argot 'morfer' (to eat) and Italian dialect 'morfa' (mouth), absorbed into Lunfardo.
morra
General
A girl or young woman; frequently used to mean one's girlfriend.
morro
General
A young person or kid; 'morra' for a girl. Can also mean boyfriend/girlfriend.
mort
General
A 'walking mort' — an unmarried vagabond woman who tramped the roads with the crew.
mortal
General
Hammered. Paralytic. Can't-find-your-own-front-door drunk. The Geordie default for a proper night out — past tipsy, past merry, all the way to mortal. Geordie Shore did its best to export the word nationally.
mortified
General
Used hyperbolically for mild social awkwardness.
moryah
General
A sceptical or ironic interjection casting doubt on what has just been said; roughly 'supposedly' or 'yeah, right'.
mos
General
The code and title defining a service member's specific job or trade.
mosey
General
To walk slowly and leisurely; to wander without urgency.
mosh pit
Music
As a verb, 'to mosh,' to throw yourself into that crowd energy.
mossed
Gaming
Used loosely for decisively beating someone in a head-to-head moment.