A fork of Rural Dictionary
When a fat woman has big fat flaps and fat upper legs. The vagina pertrudes outwards and down to a point to create a Mk1 Volkswagen Beetle Bonnet effect (the slit being the line down the middle of the bonnet).
'mate, that fat slosher must have a proper Volkswagen Beetle Bonnet under those hotpants'
When a womans labia (burger) hangs out just a tad too much from between her flaps (bun).
'mate, that slut has some serious burger bunnage on the go, her labia hangs out all over the shop'