Top Definition
chestbum is the cleavage of the woman who has wide set breasts and heavy duty cast iron underwire, causing the appearance of an arse on her chest.
Check out her tits! They've sagged with age and she's hiking them up too high causing them to splay into chestbum.
by LeniMcPoopies October 31, 2009

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When a bird has boobs that are so big, it looks like she has a bum on her chest.
Lad 1:' Fook me son look at the size of those bad boys'

lad 2; 'holy shit, they so big they loook like a bum'

Lad 1: 'thats classic chest bum material'
by WellsTownHero November 08, 2010

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt