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!"
by lawzer February 7, 2005
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those things in mario bros. in the ocean that hump ur head.....
the headhumpers are coming! swim! swim!
by kim January 20, 2004
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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
by 6611nitro July 17, 2009
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