It is the phrase given to gay men who go out at night looking for other me. Gay men who are in escene going on the pull. They are often the ones found at the bar scanning the room much how a non gay person would if looking for a girl, the main difference is that they are looking for a 'bum' to 'scrump' (steal).
Spyro: Left go scrumping...
Roz: What bum scrumping...
Spyro: No Urban.... whats bum scrumping...
Roz: Isnt that what gay people do when they are on the pull?
Spyro: I am sure i dont know!
by Spyro18 October 18, 2006
Get the bum scrumping mug.