Top definition
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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