Where one of your mates or work collegues has a "Jack Bastard Attitude", or where they act like a jack bastard continuously with the same attitude towards you.
when an individual attempts to conceal their obesity by tying a jacket, sweatshirt or sweater around their hips, leaving the rest of the garment hanging down behind them, covering their buttocks.
"That heffer needs a bigger coat to cover her huge jacketass," saidSpank Dangler from The Larrys!