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Irish, particularly Dublin, slang that means someone who ruins things, or just a general bollix.
He loused that up!
He's a feckin' louser!
louser by fromireland October 29, 2007
Related Words
Used to describe someone who causes a team to lose while playing a game. Someone who you can never win a game with no matter how hard you carry.
Person I: I can’t believe you made us lose that round Karen.. you’re literally the worst. You better have been trolling and not an actual louser.
Louser by coolerthanrat2and3 April 21, 2019
A combination of the word Loser and Louse (the singular of lice) used to describe the most annoying type of creep. Originally coined at WPI.
Courtney: Yeah, he decided to live at home.
Robert: Living at home in college? What a louser.
louser by tedium July 1, 2005
1. A lousy loser.

2. Someone who catches lice (like a fisherman except with lice)
Man! Terrance is such a louser. He's always braiding his hair in Robotics club.
louser by iawditn9494 April 21, 2008
a louser (think houser but with a L) is someone who spends free time doing fuck all. this someone or someones could be doing Something, but that something is actually a meangless waste of time. the someone in question, has no life, no hobbies that matter and is hardly ever productive. lousers may think they help, just by being in the room, but in fact they do not.
nana what are you doing?
playing free cell.
tata what are you doing?
playing solitaire.
jeez! you guys are fucking lousers!
louser by tassh March 20, 2008
1. An irritating person or one who is generally unsuccessful in most regards of life.

2. The word to call someone with whom you are displeased or whom you look down on, especially when you cannot think of another word to fit the situation.

The word was invented by Alexandra Nelson, the defendant on an episode of "Judge Judy."
Judge Judy: "What were you cursing at 5 or 6 of his friends for, you idiot? If there were 5 or 6 of his friends, what were you cursing at them for?"

Alexandra Nelson: "Because they're loserds."