1. 
[syn: rotter, dirty dog, rat, skunk, stinker, stinkpot, bum, puke, crumb, lowlife, scum bag, so-and-so, git]
WordNet (r) 3.0 (2006):
lowlife
    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, bum, puke,
         crumb, lowlife, scum bag, so-and-so, git]
Moby Thesaurus II by Grady Ward, 1.0:
50 Moby Thesaurus words for "lowlife":
   Bowery bum, bastard, beachcomber, beggar, beggarly fellow,
   blackguard, blighter, budmash, bum, bummer, caitiff, derelict,
   devil, drifter, drunkard, good-for-naught, good-for-nothing, heel,
   hobo, human wreck, knave, mauvais sujet, mean wretch, miscreant,
   mucker, no-good, pauvre diable, pilgarlic, poor creature,
   poor devil, rascal, rogue, sad case, sad sack, scoundrel,
   skid-row bum, stiff, sundowner, swagman, tramp, truant, vag,
   vagabond, vagrant, vaurien, villain, wastrel, worm,
   worthless fellow, wretch