[1] : WordNet (r) 2.0

razzing
     n : a cry or noise made to express displeasure or contempt syn:
          boo, hoot, bronx cheer, hiss, raspberry, snort,
          bird
see also:
boo hoot bronx cheer hiss raspberry snort 
bird 

[2] : Moby Thesaurus II by Grady Ward, 1.0

50 moby thesaurus words for "razzing":
   banter, bantering, booing, catcalling, chaffing, derision,
   derisive, derisory, fleering, flippancy, flippant, fooling,
   grinning, hazing, hissing, hooting, jeering, jesting, joking,
   jollying, joshing, kidding, leering, levity, mockery, mocking,
   panning, quizzical, ragging, railing, raillery, rallying, ribbing,
   ridicule, ridiculing, roasting, scoffing, smart, smart-aleckiness,
   smart-alecky, smart-ass, smartness, smirking, sneering, snickering,
   sniggering, snorting, taunting, teasing, twitting

Razzing >> R Words
Razzing, definition of term: Razzing
razzing_pag1.html