When a person's pants/jeans/shorts are riding up the butt in an unattractive fashion requiring a "manual release" of sorts - usually happens to overweight women (but not exclusively). It looks like the bum is literally eating the pants.
by Hockey Mom March 03, 2010
by nuttybar June 05, 2007
by Mohammadou Booboo May 13, 2008
A person who has more clothes up there bum than posh spice has in her wardrobe, a Arse muncher, his pants cost him £5 but hes got £4.50's worth up his arse
James 'Hungry Bum' Makowane is the Current European Champion of Arse munching, he won his title in Belguim Nov 11th 2007, he ate (his arse ate) 3 pairs of trousers and 6 pairs of boxer shorts!!!!!
by Dave Liverpool No1 January 28, 2008