cromagnon
n. an ugly male. (Collegiate.)Who is that cromagnon you were with last night?That was no magnon. That was your blind date for next weekend.
melvin
n. a studious or unattractive male. (Teens and collegiate.)Gary is such a melvin!Do you think I would go out with that melvin?
neanderthal
n. a large and ugly male.Tell that neanderthal to get out of here.Tom, don't act like such a neanderthal.