The Collaborative International Dictionary of English v.0.48:

pissed \pissed\, pissed off \pissed off\, a.
   Angered or very annoyed. [vulgar]
   [PJC]

WordNet (r) 3.0 (2006):

pissed
    adj 1: aroused to impatience or anger; "made an irritated
           gesture"; "feeling nettled from the constant teasing";
           "peeved about being left out"; "felt really pissed at her
           snootiness"; "riled no end by his lies"; "roiled by the
           delay" [syn: annoyed, irritated, miffed, nettled,
           peeved, pissed, pissed off, riled, roiled,
           steamed, stung]
    2: very drunk [syn: besotted, blind drunk, blotto,
       crocked, cockeyed, fuddled, loaded, pie-eyed,
       pissed, pixilated, plastered, slopped, sloshed,
       smashed, soaked, soused, sozzled, squiffy, stiff,
       tight, wet]

Moby Thesaurus II by Grady Ward, 1.0:

70 Moby Thesaurus words for "pissed":
   afflicted, angered, angry, bent, boiled, bombed, boozy,
   browned-off, canned, choleric, cockeyed, cockeyed drunk, crocked,
   crocko, cross, disguised, drunk, elevated, fried, fuddled,
   half-seas over, heated, high, illuminated, incensed, indignant,
   inebriated, irate, ireful, lit, lit up, livid, loaded, lubricated,
   lushy, mad, muddled, muzzy, oiled, organized, pickled, pie-eyed,
   pissed-off, pissy-eyed, pixilated, plastered, polluted, potted,
   raddled, riled up, shellacked, shirty, skunk-drunk, smashed,
   soaked, sore, soused, squiffy, stewed, stinko, swacked, tanked,
   ticked off, tight, waxy, worked up, wrathful, wrathy, wroth,
   wrought-up