Unibrows are a turn off. Not that I wouldn't date a girl with one, but they are very strange looking. If it's really think then I'll probably wanna poke it or something.
Cocky guys who try to show off their muscle any time they can. .__. I hate it so much. e__e I mean yay, good for you, but if they do it all the time it gets annoying. :/
simple enough ^w^!
Also douchebaggery, poor hygiene, standard things like that.
Oh yeah, and dumb glasses, as in the frameless/fishwire framed ones. They don't look good on anybody.
a turn off is too much make-up