Awkward Monkey Fist
When one clutches their hand into a loose fist as if holding a rolled up piece of paper, and shakes it back and forth in front of someone's crotch. This will make the person feel very awkward, at which point you will have to explain your actions to them in the following way. "See. . . a monkey is jacking you off . .. thats why its awkward!"
So I was hanging out the other day, and my best friend awkward monkey fisted me. . .