Top definition
A term used for a combat shotgun, comes from the fact that most combat shotguns weigh close to 4 kilograms
"Peace sells, but who's buyin? Who's cryin? Who's tryin? Who's poppin with the 4 pound iron?"

Ill Bill - Peace Sells
by I'mAnonymousLULZ October 21, 2008
Get the mug
Get a 4 pound iron mug for your brother-in-law Abdul.