WordNet (r) 3.0 (2006):

pet peeve
    n 1: an opportunity for complaint that is seldom missed;
         "grammatical mistakes are his pet peeve"

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "pet peeve":
   abhorrence, abomination, anathema, antipathy, aversion, beef,
   beefing, bellyache, bellyaching, bitch, bitching, bone to pick,
   complaining, complaint, crow to pick, crow to pluck,
   destructive criticism, detestation, dissent, execration,
   faultfinding, grievance, gripe, griping, groan, groaning, grouse,
   grousing, grudge, grumbling, hate, holler, howl, kick, kicking,
   murmuring, peeve, peevishness, petulance, phobia, protest,
   querulousness, scolding, sniping, spite, squawk, squawking,
   whining, yapping