A piece of wood shaped like the stock of a rifle, with a horizontal bar projecting from one side. It magically turns semi-automatic weapons (those which fire one bullet per pull of the trigger) into bullet-hoses; a device which uses the recoil of a gun to fire the next round.
One of many ways to turn your shitty california-legal semi-automatic AR-15 into a machine-gun. Very popular in US states where semi-automatic rifles are legal; chiefly used by man-children and 13-year-old boys. On the down-side, it seriously impedes accuracy, and thus is useless for criminals.
Imma take my SKS and bump-stick and shoot some dirt!
Just plug in your bump-stick to turn your glock into a matrix-style machine-pistol!
I used a bump-stick and hit nothing but air.
An overweight, chain-smoking, muscular Polish gangster who has immigrated to the UK. Also know as Polski Beefcakes. They are known for walking around in packs, smoking, drinking large quantities of Tyskie and beating the shit out of chavs who attack them.
I was walking down the road the other day when I saw half a dozen Polski Smaks coming in the other direction.
Polski Smaks keep stealing crates of Tyskie from the local shop.