A person who does incredibly ridiculous, out of control things that are justified by the very nature of said person.
Did you hear Mark hooked up with that tutor? Yeah, and he almost banged two fat girls 'cause his friends offered him 80 dollars to bang one but wouldn't do it unless her friend came too. Yeah, he's a binky donkey.
by Mark David April 25, 2008
Get the binky donkeymug.