Top Definition
The round plastic dish that is mounted on the rear hub of all new bicycles. Designed to protect the wheel spokes from the chain when it jumps off the cassette.
Bobby cut off his dork disk, and when his chain jumped off the cassette, it ate the spokes on his new Mavic 819s. Ouch! Thats gonna be expensive
by alpha52 September 29, 2008

The Urban Dictionary Mug

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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.

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The Urban Dictionary Mug

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

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The Urban Dictionary T-Shirt

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

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