A five dollar bill, because Abe lincoln looks like frankenstein. Or it could be a five dollar bill that someone drew scars on good 'ol honest Abe's face, and bolts on his neck.
Ian: Hey man, spot me a frankenstein, i need to buy a some coke
Jeff: That's pretty cheap, are you sure it's coke, and not carpet fresh?
man, someone drew some crap on Abe, now he really is Frankenstein, man, he's got a five head