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
by Bandicooties69 September 29, 2018
by that person 1 September 26, 2018
by Bill Cosby’s Left Bollock December 05, 2020
by Jack and Spades December 28, 2019
A person who’s generally happy and cheerful that is suddenly sad and upset and you’re thrown off by the presence.
“Why you over there lookin like a Sad Bill Cosby”
by King Kreations May 15, 2020