Sexual turns offs, not relationship turn offs, hrmm...
Really skinny girls are vile, I'm talking unhealthily skinny.
Aggressive kisser, too much tongue, sloppy etc.
Bad breath, definately.
My biggest turn off though is skanks, odd for a guy I know, but I can't kiss a girl who's had god knows how many tongues (or worse) down her mouth that night, let alone sleep with one.