Top Definition
The act of jizzing in your partner's mouth while telling her a joke that is so funny that the semen proceeds to snot-rocket out of her nostrils.
Person 1:"Hey how's it going with Stacy?"
Person 2:"Good bro. I think she likes my jokes. I'll know fersure as soon as I Cum Jester her."
by titomac June 05, 2011

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