n. a term used to describe any driver traveling at a higher rate of speed than you while you are driveng faster than the speed limit. In doing so the other driver is protecting you from a speeding ticket by taking it upon him/herself.
Sally: Honey, slow down! you're doing 70 in a 55!
Tom: Don't worry with that Pig Bait up ahead the fuzz will have their hands full. Thank you Pig Bait.