The act of putting one's face in between someone's buttocks, and moving one's head from side to side very rapidly while making a vigorous, lip-vibrating "brrr" sound. A close relative of the term motorboat.
Patrick: So what did you guys do last night?
Seth: Well I started off with a mudskipper, and then it went crazy from there!
Seth: Well I started off with a mudskipper, and then it went crazy from there!
by Demosthenes1 August 22, 2010