Top Definition
anus, sphincter, ballon knot, leather cheerio.
Robbie pulled a muscle in his neck while trying to watch the anal beads emerge from his brown zero.

OR

Robbie relishes in the staccato of anal beads being ripped from his brown zero.

OR

To celebrate the zero he got on his exam, Robbie lubed up his brown zero before inserting enormous Korean vegetables.
by Total Penetration May 26, 2005

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Similar to ground zero which is the site directly under the detonation of a nuclear weapon. Brown Zero is the area affected by a fart. Usually limited to a room unless the door was left open and it was really raunchy.
After I ate that big bowl of chili, my fiancee was caught at brown zero when I let one rip.
by computernut October 03, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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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