Yipin'
The act of having vigorous sexual intercourse.
"Yo, I seen your girl yipin' in the car with some dude."
yipin
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?"
"Calm down, why are you yipin?"