guns

The word “guns” means informal: well-developed arm muscles, especially biceps. In plain terms, slang for muscular arms.

“Guns” is pronounced guhnz (/ɡʌnz/ in IPA).

Here is “guns” used in a sentence: “He flexed his guns after finishing the workout.”

“Guns” is a noun.

“Guns” is a fairly common word in modern English.

In informal English, guns are well-developed arm muscles, especially the biceps. Someone with large, defined upper arms is said to have big guns. The joking phrase gun show describes flexing or showing them off, while pipes is a common alternative term for the same impressive muscles.

The slang likely comes from the resemblance between a flexed, bulging bicep and the power of a weapon, plus the idea of arms strong enough to do damage. It caught on in bodybuilding and fitness culture as an admiring, playful way to praise someone's muscular upper arms.

It is strictly informal slang, at home in casual, often boastful or joking settings like the gym, sports, and fitness culture. You would not use it in formal or medical writing, where biceps or arm muscles is correct. The tone is usually admiring or lightly humorous.

Saying "Look at the guns on him" means someone has notably big, muscular arms. Other everyday uses include "He's been hitting the gym to build his guns" and the phrase gun show, used when a person flexes to display their biceps for admiration or a laugh.