bump-stick 

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.

bump-stick by DRAC250 March 26, 2011

bump and stick 

the act of bumping into someone but not moving away instantly and staying pushed up against that person.

"Shit son! Did you see that hot guy bump and stick me? It must be love."

bump and stick by anatomically incorrect March 7, 2007

Dicksy Stick Booty Bump 

When a female snorts a line of cocaine off of her male sex partner’s erect penis, and then he immediately bends her over to snort a line of cocaine off of her buttocks.

This week end, I performed my first dicksy stick booty bump.

Dicksy Stick Booty Bump by Air Balancing Guy November 22, 2019

fatty bumsticks 

a thin person who has put on weight in strange places resulting in man breasts and a pot belly

Tim better go easy on the snacks or he'll be a fatty bumsticks (oops, too late!!)

fatty bumsticks by Bold King Cole May 17, 2003

Bumpstocking 

When a group of friends go out to shoot up cans, boxes, old tv's and such as a form of entertainment by using a bump stock on your gun or by simply putting your thumb in your jeans change pocket and your pointer finger on the trigger. When you pull forward on your gun it causes it to shoot rapid fire. Clearly a waste of ammo but a bunch of fun.

Me and the boys went Bumpstocking by the old Mitchell place last night and lit up Cooter's old Dodge.

Bumpstocking by Simphead November 23, 2020

bumpstick 

A camshaft; the part of a typical engine that is timed with the crankshaft to actuate the valves.

Karl has a serious bumpstick in that thing, listen to the lope!

bumpstick by ghost August 1, 2003

Bumstick 

Where a person doesent wipe their bum for weeks, and shit builds up out of their bum like a stick.

Hamish: Can you see that fat girls Bumstick?

Matt: Ewww She has a skanky ass.

Bumstick by TardyMoments October 31, 2011