“Who You Calling… Jabba!!” T-Shirt by George

This shirt was sold by ASDA supermarkets in the UK under their “George” label. It’s a bit of an odd design and I’m not sure I entirely get it. Is the wearer supposed to be upset that someone has called him Jabba (i.e. fat)? Or is this a reference to something else? Either way, I’m glad it uses the actual Jabba from ROTJ, and the partially B&W look is kind of interesting.