The act of slipping a Quaalude or a roofie into a woman's drink making her pass out so that you can have sex with her.
Hey man!! Don't cosby that girl's drink.

Jeff is douche bag he cosby'd that girl drink at the party last night.
by cosbybillpuddingpop July 7, 2015
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My friend’s mom was being very Cosby towards me today.
by Suki the First February 28, 2020
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When someone performs a sexual act on another while they are either usually; asleep or unwilling / unknowing.

Derived from Bill Cosby as he has sexually molested many girls, usually by drugging them first.
She was passed out after I spiked her drink so I gave her a Cheeky Cosby
by Nang Daddy September 8, 2017
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A two person drinking game that is played as follows:

Supplies needed:

-A 30 rack of beer or a bottle of alcohol with a mixer
-Two pills containing 100mg* of MDMA each (You can play this with any powdered substance really).

-Cups.

Instructions: You and the other player drink together like you normally would. The objective of the game is to get the MDMA into the other players drink without them noticing. Whichever player’s pupils dilate first loses but also wins (because MDMA).

Note: Named after famous MDMA chemist Mike Cosby.

*100 US mg converts to around 350 British mg.
Friend: Alright, Cosby challenge starts in 3... 2... 1... GO!

Me: *sets down drink*
“I’m going to the bathroom I’ll be right back.”
by danasp_42 December 20, 2020
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Slipping sleeping pills into an alcoholic beverage and give that to their date and have sexual intercourse with them without them knowing it.
Bill was mad at his girlfriend hasn't had sex with him in a long time so he gave her a Bill Cosby Sleeper.
by dustylicious October 29, 2015
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The show title is a variable. Howdy doody show crack whore. That 70s show crack whore.

The phrase describes a type of addict.

They're an addict and they'll do anything for crack but you like them and they're only going to be around for one episode. They're not family or regular character in your life.
I can give you a ride to rehab but I'm not signing anything. You're a Cosby show crack whore.
by Lola Mae 2022 December 12, 2022
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Looking up totally random and fake sex definitions on Urban Dictionary.
G1: “I’m gonna do The Cosby.”
G2: “I hear that’s a great way to get disowned by your parents.”
by LongJohnJohn October 20, 2020
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