资料来源 : Webster's Revised Unabridged Dictionary (1913)

Bum \Bum\, v. i. [imp. & p. p. {Bummed}; p. pr. & vb.n.
   {Bumming} (?).] [See {Boom}, v. i., to roar.]
   To make murmuring or humming sound. --Jamieson.

资料来源 : WordNet®

bum
     n 1: a person who is deemed to be despicable or contemptible;
          "only a rotter would do that"; "kill the rat"; "throw
          the bum out"; "you cowardly little pukes!"; "the British
          call a contemptible person a `git'" [syn: {rotter}, {dirty
          dog}, {rat}, {skunk}, {stinker}, {stinkpot}, {puke}, {crumb},
           {lowlife}, {scum bag}, {so-and-so}, {git}]
     2: a disreputable vagrant; "a homeless tramp"; "he tried to
        help the really down-and-out bums" [syn: {tramp}, {hobo}]
     3: person who does no work; "a lazy bum" [syn: {idler}, {loafer},
         {do-nothing}, {layabout}]
     4: the fleshy part of the human body that you sit on; "he
        deserves a good kick in the butt"; "are you going to sit
        on your fanny and do nothing?" [syn: {buttocks}, {nates},
        {arse}, {butt}, {backside}, {buns}, {can}, {fundament}, {hindquarters},
         {hind end}, {keister}, {posterior}, {prat}, {rear}, {rear
        end}, {rump}, {stern}, {seat}, {tail}, {tail end}, {tooshie},
         {tush}, {bottom}, {behind}, {derriere}, {fanny}, {ass}]
     [also: {bumming}, {bummed}]

bum
     v 1: ask for and get free; be a parasite [syn: {mooch}, {cadge},
          {grub}, {sponge}]
     2: be lazy or idle; "Her son is just bumming around all day"
        [syn: {bum around}, {bum about}, {arse around}, {arse
        about}, {fuck off}, {loaf}, {frig around}, {waste one's
        time}, {lounge around}, {loll}, {loll around}, {lounge
        about}]
     [also: {bumming}, {bummed}]

bum
     adj : of very poor quality [syn: {cheap}, {cheesy}, {chintzy}, {crummy},
            {punk}, {sleazy}, {tinny}]
     [also: {bumming}, {bummed}]

bumming
     See {bum}