That feeling of "highness" one gets from being a loser, losing, failing to succeed (whatever your definition of success may be). Loser high probably comes from a lack of self-esteem, middle-class apathy, perfectionism, self-pity, or some combination of that.
-emo people, probably all of them. they get "high" off of being losers, which would usually make someone feel "low"

-losing at video games, like when you go nuts in gta just to 'cause destruction and get beat by the cops.
person 1: "Hey hey, why'd you ruin my game of San Andreas?!"
person A:"I like losing and getting that loser high."
by the rich July 30, 2006
Get the loser high mug.