1. (Noun) when the vaginal lips are pushed together until they appear as twosausage patties and then placed in between two pieces of an english muffin to make it appear like a mcmuffin.
My girlfriend fell asleep naked the other day so i pushed her vagina into a twat mcmuffin and devoured that shit!
(noun, plural, Brit.) Personalised registration plates on a motor vehicle that suggest to everyone but the owner that the vehicle's occupants are twats, chumps, or under-endowed fuckwits with all the charm and sex appeal of a road accident.