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A person who habitually is active late at night
"You are such a goat sucker for working 'till morning comes.
by squitten June 05, 2008
A type of bird that has a hysterical name.
Little kid at a zoo: Look mommy, it's a goatsucker bird.
Cool kid who heard the little kid at the zoo say this: HAHAHA, goatsucker...
by GoatSucker00 August 07, 2009
a weirdo who prolly screws goats
"that dudes a goat sucker"
by sid malana January 29, 2004