A fork of Rural Dictionary
After anal sex the resulting mixed discharge of sperm and poo, then greedily lapped up like marmite on hot buttered toast.
I say Mr Cholmdley-Warner your breath is a bit suspect have you been a marmite muncher with Mrs Cholmdley-Warner, Old Chap?
The act of willfully and yet casually scrumping peoples' bottoms in a public place
Ooh Mable! I think I have been the victim of a butt scrumping on the Underground.
The art of having a sly wank unnoticed by the surrounding public, ideally practised on public transport, shopping malls or places of authority. Aimed at the gender/animal of your choice.
Mummy why has that person gone red in the face? Ignore him Beatrice, I think he's incocknito