jawbilla Share definition Flag any person that has a jaw line that is wider than thier face or goes out past their nose. Dude, I had this blind date and the chick totally ended up being a Jawbilla, just like Jay Leno is a jawbilla. jawbilla by skrilla June 23, 2003 0 0 Get merch Get the jawbilla mug. Buy Now — $32.95 See more merch