The act of being stupid enough to take a pill from a clearly mal-intended Bill Cosby, who may suspiciously invite you to a party where you're the only other person, or his suite, and offer you a pill and/or drink, then force his penis into your mouth/vagina. The victim of a Cosby will most likely wake up during the ordeal, at which point they leave, realize they're alone and covered in Cosby semen, or most likely wake up to him telling them they drank too much whilst putting his pants back on.
"There was a knock at the door, and it was Cosby, who she says walked in and said he was impressed with her work and "implied that he was going to see to it that I will become a major star through his direction."

“Suddenly Cosby approached me and took out his penis, which was now in the line of my face and pressed up against it,” she said. "He took his hands and put them on the back of my head and forced his penis in my mouth, saying, ‘Have a taste of this. It will do you good in so many ways.’” Before walking out of the green room, Moritz recalls Cosby saying to her: "Now you don't want to upset me and the plans for your future, do you?"

Bitch got Cosbied.
by JayDh89 November 23, 2014
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A drug used to sedate women, or to make them incoherent to prevent unwanted sexual acts.
1)You gave that poor girl a Cosby didn't you?
1A) Yup, and she was out like a light.
by UnknownIgnorance December 2, 2014
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Creeping up on a female in a groopey manner
Alex quit kissing on Courtney and stop grabbing her tits your totally cosbying
by 1212332 January 31, 2015
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When you sneak into a sleeping chicks house and cum on her face then yell you just got cosbied then leap out the window
by Hshxnrnsifb eksgevsid September 30, 2018
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A multi colored sweater.

Stemming from the days of the Cosby show, in which the main character, Heathcliff Huxtable, played by Bill Cosby, constantly wears bright, multi colored sweaters.
Tom came into the office wearing a colorful sweater.

Mohan exclaimed "Damn Tom, nice Cosby!"
by Chips August 11, 2004
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A shit, usually of full girth. Tendency to bring pain upon exit.
1. "I hate dropping the cosbys at public restrooms"
2. "I drove Bill Cosby and the kids to the museum"
3. "The cosbys are pushing at the gate"
by G-Man March 5, 2003
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A form of date-rape that includes having your drink spiked with drugs before being molested or raped.
1. Sarah went to the party on Friday and her drink was cosbied with a roofie. 2. Will went to jail because he cosbied some women at a bar.
by XxNovaXx November 25, 2014
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