from Gaelic meaning "beautifully formed." Slang as someone who is beautifully formed; proper name as well.
Person: Hey look at that boy named Jack.
Other: Wow, he is really a Quinlan!
Person: Right on, like no other!
by Jim August 21, 2005
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It is a move in the popular video game HALO 2. It's when the opposing player jumps in the air and while he's in the air he shoots you in the head, this move is tough and is sweet when accomplished!
by Evan Morrell September 7, 2006
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The most amazing boy you'll meet. He will have cute blue eyes and curly brown hair to go with it. He can make you laugh on your darkest days, and make everyday worth living. He drives crazy but you don't mind it. He is strong and likes memes. If you ever meet one, youll never forget them. This boy will steal your heart the moment you see him. He knows how to make his girl happy.
"Man his hair sure makes him look like a Quinlan?"

"Only a Quinlan would drive a bright orange dodge caliber."
by BeepTheJeep October 22, 2018
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A very large orgy, or penis.
"He has a quinlan!"
"That quinlan last night was awesome."
by Starfishfromspace September 26, 2013
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quinlan WHYYYYY
by TEHPOO September 21, 2018
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