What is Yark Yark Yark?
1.
It IS the optional audible portion of the yark dance.
(Trashy white girl walks by with a black guy)
John: Man, look at that yark
Jason: Yeah, (executes a yark dance) yark yark yark
See
2.
What is said in response to a bad joke.
Dave: Why did the chicken cross the road?
Dave: Anyone, anyone?!
Dave: Because I'm Jewish!!!1
Everyone: Yark Yark Yark