loser
     n 1: a contestant who loses the contest [syn: {also-ran}] [ant: {winner}]
     2: a person with a record of failing; someone who loses
        consistently [syn: {failure}, {nonstarter}, {unsuccessful
        person}] [ant: {achiever}]
     3: a gambler who loses a bet [ant: {winner}]
Source: WordNet® 2.0

loser n. An unexpectedly bad situation, program, programmer, or person.
   Someone who habitually loses. (Even winners can lose occasionally.)
   Someone who knows not and knows not that he knows not. Emphatic forms
   are `real loser', `total loser', and `complete loser' (but not **`moby
   loser', which would be a contradiction in terms). See {luser}.


Source: The Jargon File