yap
     n : informal terms for the mouth syn: trap, cakehole, hole,
          maw, gob
     v : bark in a high-pitched tone; "the puppies yelped" syn: yelp,
          yip
     also: yapping, yapped
see also:
trap cakehole hole maw gob yelp 
yip yapping yapped 

yapping
     see yap
see also:
yap 

54 moby thesaurus words for "yapping":
   bawling, beef, beefing, bellyache, bellyaching, bitch, bitching,
   blatant, boanergean, brawling, clamorous, clamoursome, complaining,
   complaint, crying, destructive criticism, dissent, faultfinding,
   grievance, gripe, griping, groan, groaning, grouse, grousing,
   grumbling, holler, howl, kick, kicking, loudmouthed, murmuring,
   noisy, obstreperous, openmouthed, peeve, peevishness, pet peeve,
   petulance, protest, querulousness, scolding, screaming, shouting,
   sniping, squawk, squawking, vociferant, vociferating, vociferous,
   whining, yammering, yelling, yelping