The Collaborative International Dictionary of English v.0.48:

boob \boob\ v.
   to commit a faux pas or fault.

   Syn: sin, commit an offence, blunder, goof.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

boob \boob\ n.
   1. an ignorant or foolish person.

   Syn: dumbbell, dummy, dope, booby, pinhead.
        [WordNet 1.5]

   2. a female breast. [informal or vulgar]

   Syn: breast, bosom, knocker, tit, titty.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

boob
    n 1: an ignorant or foolish person [syn: dumbbell, dummy,
         dope, boob, booby, pinhead]
    2: either of two soft fleshy milk-secreting glandular organs on
       the chest of a woman [syn: breast, bosom, knocker,
       boob, tit, titty]
    v 1: commit a faux pas or a fault or make a serious mistake; "I
         blundered during the job interview" [syn: drop the ball,
         sin, blunder, boob, goof]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "boob":
   Babbitt, Philistine, asshole, babe, bag, boeotian, boobs, booby,
   bosom, breast, breasts, brisket, bust, chest, chump, cinch,
   credulous person, crop, cull, ding-a-ling, dingbat, dingdong, dolt,
   dolthead, dug, dupe, easy mark, easy pickings, fall guy, fathead,
   fish, fool, galoot, gobe-mouches, goof, greener, greenhorn, greeny,
   gudgeon, gull, innocent, jerk, jerk-off, klutz, knockers,
   leadpipe cinch, mama, mamelon, mamelonation, mammary gland,
   mammilla, mammillation, middlebrow, monkey, mutt, nenes, nipple,
   oaf, pap, papilla, patsy, pigeon, pigeon breast, plaything,
   prize sap, pushover, sap, saphead, sawney, schlemiel, sitting duck,
   stooge, sucker, teat, thorax, tit, tits, titties, titty, toy,
   trusting soul, udder, victim