A Psychotic person. Short for lunatic.
Damn that guy was chewing on his finger because he thought it was a peice of chicken. What a fucking LOON!
by Delta9 March 1, 2005
In Aberdeen, Scotland, it's local dialect (doric) meaning a young guy. That's probably why there's another definition further up, for fans of the Scottish actor Billy Boyd. Whose not from Aberdeen I think but never mind.
"Aye, d'ye ken that loon fae two doors up?"
by loon July 2, 2004
A crazy, psychotic person who doesn't care a.k.a nutter
by Loopyloulou September 11, 2006
noun
1 a large North American bird that eats fish
2 =LOONY
3 a rapper who belongs to Badboy Record
by obie September 11, 2003
The new twitch-friendly form of the word simp.
You love to loon for pokimane.
by The Some December 17, 2020
1.A bird of somesort that people keep telling me of...
2. a crazy idiotic person who likes to rant.
Lyss: "Yeah, I saw a loon the other day.."
Kali: "...a crazy peep? Uhm.. that's.. nice..."
Lyss: "No! It's a bird!"
Kali: "O...kay? Uhm.. *coughs* OH!!! Did I mention my weird obsession for the E.D.B's of D.?"
Lyss: " *sweatdrops* no... you loon.."
Kali: "....I'MA CRAZY.. BIRD...BRAINED.... thingy? ...WHOO-HOO!!!! I mean.. YEE HAW!!!"
Lyss: "X.x;"
Kali: "...*coughs* so.. did you read my journal? ^-^"
Lyss: "Yes.. god you write a lot.. you loon! @.@;"
Kali: "Aheheheh.. ^^;"
by Omajinai December 19, 2003