A joke that is told while smoking weed in a circle, and thus must be kept between the circle. "What's said in the circle stays in the circle."
James: you can't expect to be on the "top 5 fighters at work" list when you have a curfew.....

Betty: Oh man that's funny ! I'm going to have to tell people at work!
James: Nahhhh nah nah that's a circle joke.
by The stones of Abington April 16, 2016
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When you laugh at your friend's jokes while they laugh at yours.
"Bring beers, weed and humor. We're gonna have a sick circle joke at the cabin this weekend"
by mambo-p May 19, 2015
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