= L =
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.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.