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The sexual act of eating Fruit Loops, Fruity Pebbles, Trix, and Boo Berry- or any other 'bright, colorful' breakfast cereals- and then vomitting the tacky, dazzling mixture onto your partners chest. The result should look similar to the incredible sweaters that Bill Cosby wore during his highly successful 1980's sitcom "The Cosby Show".
Nicole was overjoyed to receive "a Cosby Sweater" for her birthday.
by Nicole & Eric September 11, 2006
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2
A: A oversized, hideous looking sweater with ugly patterns and colors, often worn by old men or hipsters with no taste.

B: A sweater a senile colorblind person would pick out.
As referenced in HIGH FIDELITY: "That's a COSBYYYY SWEATAAH, a COSBBY SWEATAAH!" - Jack Black

"Aww look at that sad sweater, did your mom pick that out for you?"
by definitionmassah January 28, 2004
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3
A sweater worn By BILL COSBY on the TV show THE COSBY SHOW. The sweaters were designed by KOOS VAN DEN AKKER, a NYC designer who is famous for his wild collaged garments. After Cosby notables such as Erik Estrada, Chuck Norris, and Richard Simmons became obsessed with obtaining their very own Koos original sweaters. Koos recently started a new line of these sweaters. Not for the faint hearted sissies but for guys with guts! www.koosvandenakker.com
bill cosby koos van den akkercosby sweaterfashion
by richardkoek July 17, 2012
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4
In light of recent abuse/rape charges, the Cosby Sweater is a sex act during which the man eats a Jell-O pudding cup yelling, "Zippity Zoppity, here comes my floppity!" as he ejaculates. For the family planners out there, the act can be taken up a notch by ejaculating into the empty pudding cup.
You never walk down the pudding aisle the same way again after getting a Cosby sweater.
by porcupinecone November 19, 2014
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5
The multi-colored lint left in one's ass crack after wearing flannel boxer shorts.
It took me an hour to get that cosby sweater off my ass!
by Jeff Conway September 13, 2008
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6
The act of eating a large bowl of fruit loops pre-coitus, then engaging in a furious fuck fest until you feel the need to vomit. Just as your about to cum in her you jam your fingers down your throat, causing you to throw up all the undigested fruit loops you ate earlier all over your partners chest and stomach, resembling one of bill Cosby's sweaters. Extra points for yelling out " jello pudding pops"( in bill Cosby voice ) just as you cum.
Me and that skank bitch were fucking outside and she said she was cold, so I gave her a Cosby sweater. -Dubz

VOMIT HOT POCKET MEXICAN BREAKFAST
by Dubz Street April 04, 2016
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7
To secretly drug a young woman and have your way with her, but act like there's nothing wrong with it.
Dude, did you see what that chick at the bar is wearing. I'm totally going to take her home and Cosby Sweater her.
by Hibachi SuperVillain November 20, 2014
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