"M" Slang

mumu

Street

An insult meaning someone is foolish, gullible, or easily deceived.

mun

General

A Valleys filler word used to add emphasis or warmth to a sentence, similar to 'man' or 'mind'. It carries no literal meaning on its own.

munchies

General

Snack food, or the hunger/craving for it.

munted as

General

An intensified form of 'munted' using the Kiwi 'as' intensifier.

munter

General

A foolish, clumsy or obnoxious person; can also mean someone extremely intoxicated.

muntin

General

One of the Valleys' many words for unattractive, a cousin of boggin and mingin.

muppet

General

A silly or incompetent person; a gentle insult.

mus mus

General

A rat or mouse; features in proverbs ('di higher di mus mus climb...').

muscle

Street

'Muscle' refers to the enforcers who provide physical intimidation for a criminal operation, or to the use of force. To 'muscle in' is to force one's way into a racket.

muscle confusion

General

The idea (often criticized as broscience) that frequently changing exercises 'confuses' muscles into more growth.

muscle memory

General

The phenomenon where previously trained muscle returns to its former size and strength much faster than it was first built.

muscle mind

General

Colloquial phrasing for consciously engaging and focusing on a muscle as you train it to improve activation.

muscle mommy

General

An admiring term for a woman who is notably muscular and strong, celebrating female strength.

mush

General

A mate, a geezer, an acquaintance — also a direct address like 'mate' or 'pal'. Friendly by default but can turn aggy depending on tone: 'oi, mush' is rarely a hug.

mushburger

General

A wave (or whole session) that is slow, weak and mushy, offering little push or shape.

mushy

General

Describes slow, weak, poorly-shaped waves that lack power. Also called a 'mushburger'.

music

General

A brevity code for radar electromagnetic deceptive jamming being employed — electronic countermeasures intended to confuse enemy radar.

music show

Internet

A televised program featuring live idol performances, with a weekly first-place winner decided by charts, sales, and votes. Key shows include Music Bank and Inkigayo.

music show win

Internet

A first-place award on a weekly music show (Music Bank, Inkigayo, M Countdown, etc.), tallied from sales, streaming, votes, and broadcast points.

mustang

General

A commissioned officer who previously served as an enlisted member, respected for having 'come up the hard way.'

muster

General

To save or hoard, particularly money, putting it aside carefully.

mute

General

An air in which the rider grabs the frontside (toe) edge of the board with the leading (front) hand, often while airing backside.

mutt and jeff

General

Deaf — either literally hard of hearing, or wilfully ignoring someone. Frequently shortened to just 'mutt' once the listener knows the rhyme.

mutuals

Internet

People who follow you and you follow back. On stan Twitter, Tumblr, and TikTok, your mutuals are your actual social circle — the ones who reply to your posts at 3am about a 30-second teaser clip. Shortened to 'moots' for that extra layer of insider warmth.

mv

Internet

The official music video for a song, a centerpiece of any K-pop comeback and a key metric via view counts. Teasers and reaction culture revolve around it.

mvc

General

A road traffic crash involving one or more vehicles, a frequent source of trauma patients. Older notes may use MVA (motor vehicle accident).

mvp

General

An award or label for the standout, most important performer of a game, season or tournament.

mwongmi

Internet

Keyboard/text slang expressing bafflement at something weird or nonsensical.

my bad

Pop

A quick, low-stakes apology acknowledging you messed up.

my g

General

Term of address for a mate — short for 'my guy,' itself shortened from 'my gangster.' Warmer than 'bruv,' tighter than 'fam.' Use it for someone you've actually got time for.

my other half

Internet

An affectionate term for one's romantic partner, implying the two together make a whole.

my person

Internet

A phrase for the single most important person in your life—the one you rely on and are emotionally bonded to.

my wife's boyfriend

Internet

The imaginary alpha who's actually keeping your household afloat while you lose the mortgage on 0DTE calls. Pure WSB self-flagellation — you're not the man of the house, you're the degen in the basement; the real breadwinner is your wife's boyfriend. Used to flex a loss, soften a brag, or signal you're in on the bit.

myther

General

To bother, pester or nag someone — repeatedly, annoyingly. Kids myther for sweets; partners myther about the bins.