Headbump 

When you and your mate are having a threesome with a chick, and she deepthoats your dick and your mate is giving it anal, then your dickheads touch.

"Man, we headbumped last night"

"Me and my friend headbumped last night in a hot latino, it was rad"

Headbump by wsdfghjklkjhgfd November 1, 2019

headhumper 

Slang for the headcrabs in Half Life 1 and Half Life 2.
Headcrabs latch onto the victims head and turn him/her into a zombie, hence the name headhumper

"Look out, headhumpers!"

headhumper by lawzer February 7, 2005

fucking headhumpers 

Small crab alien from the game half-life/half-life2 they can turn humans into zombies by humping the guy/girls head with its beak (WTF) the were called that in the popular ____'s mind sieries on you tube by Barney the security gaurd

Barney the security gaurd: fuck you tiny crab basterdes I I'm just gonna call you head humpers from now on now were'd you go ... AGH FUCKING HEADHUMPER die die die die die.
Dame you fucking headhumpers

fucking headhumpers by 6611nitro July 17, 2009

Head Bump, Fist Pump 

1. The act of masturbating (the bumping of the tip of the penis) and fist pumping at the same time. This act is usually done when watching exciting porn or when someone just really likes Jersey Shore.

2. The act of making the previous definition motions as a dance.

1. Person X: Dude you wanna go down town tonight?
Person Y: Na I rented a gang bang porn and I think I'm going to cheer on the guys by doing the Head Bump, Fist Pump.

2. Person X: How are you banging a different girl every other week?
Person Y: I just Head Bump, Fist Pump like a champ at the clubs.

Head Bump, Fist Pump by C.2.P. June 24, 2010

headhumper 

those things in mario bros. in the ocean that hump ur head.....

the headhumpers are coming! swim! swim!

headhumper by kim January 20, 2004