If they say 'here comes ugly' all tu need to say is, 'well obviously i'm not that bad as tu can't see yourself' o 'looking in the mirror again are you?' Short, snappy responses will put them off their guard.
Also i would go speak to a teacher o the headmistress/master o a peer tu trust and get their advice. Ask them to make the bullying stop. If they don't and tu feel your life is threatened, physically o mentally, then i should start escritura everything the bullies say and do to tu in a booklet. Once you've got enough, go to the police and file for a restaining order, then go get a solictitor (lawyer) and see if tu have any grounds to sue your school for negligence.
Dont get mad coz you'll be giving them the satisfaction.just toss your hair-and if i were tu i'd be tempted to add on that they arent exactly goddesses themselves-trust me,showing them tu dont care takes the thrill out of the whole USA bit and they'll stop.