Top Definition
A small valve or faucet used to drain or reduce pressure, as from a boiler or radiator.
Before you remove that radiator, open the petcock and let it drain.
by Reaper October 13, 2003

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1. the #1 penis one is currently having sex with- no strings attached

2. the alternative penis one is having sex with while #1 cock is out of town
I need another pet cock until my pet cock comes back Monday.
by Bicycle101 November 05, 2010

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To stroke the cock with a petting motion. This is typically done to make the cock stand alert.
That bitch was trying to get my attention so she pulled the ole petcock and I stood at attention immediately.
by Estes June 24, 2011

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The Urban Dictionary T-Shirt

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the cock of a pet
but its word is self explanitory
"mannn mai dogs petcock is pimpen all the dogs in the neighborhood"
by teddybangcock laulea May 04, 2006

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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

Soft and offensive. Just like you.

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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).

Buy the t-shirt