guns

1. (bodybuilding, slang) Well-developed muscles of the upper arm, especially the biceps and triceps.Examples: "And there's still no better way to throw down the fitness gauntlet than to roll up your sleeves and unveil some powerful guns."; "I read in another magazine about a workout that can put a whole inch on your arms in just one day! Obviously that sounds awesome, because my guns are only 15 inches."Synonyms: pythons#Noun, biceps#Nounpluralplural-onlyslang