The Oxford Thesaurus An A-Z Dictionary of Synonyms - bum n.

1) buttocks, posterior, hindquarters, fundament, behind, rump, bottom, behind, derriЉre, rear end, backside, seat, rear, Colloq Brit arse, US fanny, can, hinie, tush, tushy or tushie, tokus or tochis or tuchis, keister or keester, ass: Why don't you get off your fat bum and go out and get a job?! 2 tramp, panhandler, beggar, vagrant, loafer, drifter, vagabond, hobo, derelict, gypsy; Brit caird, tinker, traveller; US (shopping-) bag lady: Along the Bowery the doorways and pavements are strewn with bums. 3) improper, unjustified, false, trumped up, untrue, fabricated, made-up, bogus: That auto theft charge was a bum rap, but he still served 18 months. --adj. 4) bad, awful, unfair, dishonest, poor, rotten, Slang lousy, crummy: I still think you got a bum deal on that toaster. --v. 5) borrow, beg, sponge, Colloq scrounge, cadge, touch, put the touch on, US mooch, hit, hit up: Can I bum a cigarette from you?