Top Definition
A group of three males engaging in sexual acts together.

A threesome of only men.

It is referred to as A Jester's Hat due to the three long cone's that hang off of the hat, this imagery relates to the three penises involved in the act.
Nate: Dude, this party is completely ridiculous!

Dan: How so?

Nate: I walked into a room and there was A Jester's Hat!

Dan: Holy shitting thundercunt, that's crazy.
by nateminicooper December 06, 2010
A graphic, e.g. a drawing, of a vagina.
Johnny got into trouble for scribbling a jester's hat in a very expensive schoolbook.
by pentozali December 20, 2009
A sexual act performed either kneeling, squatting or sitting, surrounded by a number of standing males in a circle brandishing their penises.

The person in the middle of the circle then proceeds with oral sex on the penises, especially wanking/jerking off 2 penises at a time to emulate the shape of a Jester's hat on his or her head.

Note: Each penis refers to one of the floppy points on a jesters hat (liliripes). A minimum of 3 is required.
"That party was banging last night. Some slut was giving me and the boys a jesters hat until we jizzed all up in her face like we just opened a tin of custard."

"sup girl. how do you feel about wearing a jester's hat for me and the boys tonight?"
by cherrydizzle August 16, 2009
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