Top Definition
The act of having vigorous sexual intercourse.
"Yo, I seen your girl yipin' in the car with some dude."
by johnny bolas July 03, 2009
1 more definition
People yelling and typing their yells online. Mostly done in chat rooms. Also known as Yahoo Trippin.
I went into a chat room the other night and they were yipin at each other.

"Calm down, why are you yipin?"
by King Titus May 11, 2006

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