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.
Jason: "Check out the hungry bum on the chick in white pants."

Sam: "Yikes, that's just wrong."
by Hockey Mom March 03, 2010
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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When the underpants you are wearing are riding up your backside and therefore being "eaten"
"Man I have a terminal case of hungry bum" she said as she dug her underpants out of her bum
by nuttybar June 05, 2007
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Donkey Punch Plush

10" high plush doll.

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When a persons lower clothing rises up into their bum crack.
Friend 1: Look at that bird's arse.
Friend 2: Haha! Hungry bum
by Mohammadou Booboo May 13, 2008
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Golden Shower Plush

He's warmer than you think.

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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
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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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