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A Keystone Car Wash is the exact same thing as an Irish Car Bomb but instead the poor individual uses Keystone instead of Guinness.

Drink is made as follows: 1. take a shot or double-shot glass and fill half-full of Bailey's Irish Cream 2. fill the rest of the shot or double-shot glass full of Irish Whiskey. The whiskey and Baileys should remain separate. Drop it into a half-pint of Keystone! 4. Drink quickly!
Oh gawd, that Keystone Car Wash was almost as good as an Irish Car Bomb. Next time bring some Guinness.
by KCWInvetor September 06, 2010
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