What is Kerrunk?
The sound made when one reverses an automobile and asks:
"I wonder how close I am to that other car?"
Before saying to oneself "Well, I can't get any closer than that!"
"Oh sh*t! A Porsche... now that's going to cost someone a lot of money... Robin old chum, let's exit... to the Batcave!"
From "BatTheft Auto: The Movie" (Pussdog Pictures Inc.)