A male who is obsessed with 4chan and Runescape, you will often hear a Cooper say, "You are a troll", or bring up some joke that only he and a few others may understand. Even though a Cooper can be annoying, he is a generally a decent friend.
Yo bro why you trollin' on Cooper's facebook.
by SupahOwnageman3333333333 December 15, 2010
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Some faggot with long hair. Probably jerks off to ISIS videos. Listens to X and shit.
Person 1: "Who's most likely to become a school shooter"
Person 2: "That'd be a Cooper"
Person 1: "I agree"
by ThatGreekGuy_ October 16, 2017
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To hold a bowl til it burns out.
Dude you totally coopered the bowl.

Dont let the bowl coop out.
by brooks1975 February 7, 2010
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A person with a big, fat mouth.

Likes to kiss girls with it.
That person has such a big Cooper.
by Bob 3.0 March 16, 2017
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a hoe because he dates his best friends ex girl without even asking him and he breaks up with his girlfriend for her
Cooper is a dumbass hoe
by Tom Holland’s Girlfriend January 28, 2019
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Mobile Phone/ Cell Phone, as used by commedian and womaniser Russell Brand
I've got over 1000 numers on my darling cooper
by 99205 November 11, 2006
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