What to say when someone insults your nose?

Okayy like at my school.. ALL the boys like me.. But they like to "rib" everyone.. Nd when they "rib" me they say.. Look at yo nose, look like it been on steroids.. or Wow isnt it a good day for your nose. . . Blah Blaah or U got the Micheal Jackson nose!! Nd like when he "ribs" me he has ALL his friends for backup so ALL of them can laugh.. Nd they say i got a small .. Just give me someREAL good comebacks or just somethin to make them shut up