(n) Corruption of "dumb loser". First appeared as a typo on Facebook.
1) A person who consistently zeros in on and maintains a flawed argument even after having been proven wrong
2) A person who makes a stupid move/decision
3) A person who unfailingly begins an argument with the stupidest person in the room.
1) It's 2012. Anyone who still has a W '04 bumper sticker on their car is a dumb laser.
2) You were just totally pwned, you dumb laser.
3) He's always getting into fights with idiots. He's such a dumb laser.
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