A drink with a roofie in it. Prepare to be raped.
Bill Cosby slipped her a bill cosby. When she passed out, her went to town.
by Eggplant0 November 25, 2014
A beverage that has been spiked with drugs, and given to an uknowing person so the scumbag who gave it can have their way with them.
Hey did you see that guy give that lady a Bill Cosby!? Im going to tell. Her he put something in her drink.
by L0nestar November 28, 2014
A cocktail made so strong that it could lead to future rape allegations against the server. The original drink can be made from any base ingredient such as coffee or juice but will usually be laced with barbiturates, Quaaludes or other knock-out tonics from back in the day. Also see Mickey, rohypnol and Date Rape.
Person 1 (sipping cocktail) "Dude, I asked for a simple Gin and Tonic, not a Bill Cosby!"
by Funny Man Andy December 12, 2014
v: To slip a roofie into someone's Jell-O pudding and then proceed to rape them once they become unconscious.
Danny pulled a Bill Cosby on Evelyn, he should go to jail for what he did!
by Hamzawesome1 January 11, 2015
1. See date rape.
2. To slip a drug (i.e. GHB, roofies, ketamine) into an alcoholic drink, give that drink to a female within the ages of 15-35, then proceed to rape said woman after they become unconscious.

3. An individual who commits the aforementioned acts.
1. She needs to report that guy for Bill Cosby-ing her!

2. I saw Alex try to slip a roofie in my Jello pudding. He is a total Bill Cosby.
by Hamzawesome1 January 9, 2015
to blackout drug, then violate drugged person(s)
Andrew is going to bill cosby the shit out of Maria after canapés are seved.
by T Phat November 5, 2015