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18.
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 18, 2003
 
1.
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 01, 2005
 
2.
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 02, 2004
 
3.
A crazy, psychotic person who doesn't care a.k.a nutter]
C you are a proper loon
by Loopyloulou September 11, 2006
 
4.
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
 
5.
Shortened version of the Canadian word 'loonie' which means a one Canadian dollar coin which has a loon (bird) on one side. It is equivalent to UK 'Quid'
I got ten loons in me pocket.
by Canadianhero September 03, 2012
 
6.
Crazy mofo's. Psychotics. Loonies.
Damn i went to a party last night and saw some guy get his throat sliced by a couple of Loons.
by Delta9 March 01, 2005
 
7.
Pants, short for Pantaloons.
I bought me some new loons today.
by HipJThrilla July 22, 2009