The distinct size, shape and form of a female chav's buttocks where size is proportionally larger relative to that of the rest of her body. This is the result of consistent high intakes of saturated fat, salts or sugar and little or no fruit, vegetables or dietary fibre as from a very young age (possibly birth). Due to a high metabolism and an active childhood, The excess of ''junk food'' results in a ''pepsi Ass''.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.