WordNet (r) 3.0 (2006):

toss off
    v 1: write quickly; "She dashed off a note to her husband saying
         she would not be home for supper"; "He scratched off a
         thank-you note to the hostess" [syn: dash off, scratch
         off, knock off, toss off, fling off]
    2: drink down entirely; "He downed three martinis before
       dinner"; "She killed a bottle of brandy that night"; "They
       popped a few beer after work" [syn: toss off, pop, bolt
       down, belt down, pour down, down, drink down,
       kill]

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "toss off":
   ad-lib, bat out, bib, booze, botch, bungle, cook up, dash off,
   do anyhow, do by halves, do carelessly, do offhand, drain the cup,
   dram, drink, drink bottoms-up, drink deep, drink hard, drink in,
   drink off, drink to, drink up, extemporize, fake, fake up,
   follow strong drink, fudge up, gargle, grog, guzzle, imbibe,
   improvisate, improvise, jury-rig, knock back, knock off, knock out,
   knock together, lap, lap up, lash up, make up, nip, patch,
   patch together, patch up, play by ear, pledge, pound out, pull,
   quaff, rough out, roughcast, roughhew, scrap the plan, sip,
   slap up, soak, strike off, suck, suck in, suckle, sup, swig, swill,
   throw off, throw together, tipple, toast, tope, toss down,
   toss out, toss together, trifle with, vamp, wash down, whip up,
   whomp up, wing it