petcock
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.
petcock
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.
Petcock
The sexual act, where two homosexuals use their pet rooster to pleasure each other.
Hey, have you guys tried the petcock? It's great