Top definition
A concoction of Jack Daniels and Orange Juice.

The name comes from the "Sledgehammer", a drink involving Vodka and Orange Juice, and the fact that Jack will never fail to just fuck you up.

Advised to Drink In Moderation.
"Last night I had five fuckdrivers.....and I don't remember much after that."
by jbling January 22, 2007
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