Here is the top definition from urbandictionary.com, evidently written by a contented loser.
"A person who has fallen off the social ladder, climbed down the social ladder, jumped off the social ladder, or just never bothered to climb the social ladder in the first place. Upon arrival on the ground, losers begin to befriend fellow groundlings and realize how much fun a person can have when gravity isn’t an issue. It is perfectly acceptable to insult losers, because they have nowhere to fall to and it won’t hurt much."
Retired English Teacher