Slang term for Mogen David wine, especially the fortified-wine MD 20/20 variety. The MD stands for Mogen David. It was shortened to MD for their line of bum wines to differentiate between their more respectable (if no less nasty) line of kosher wines.

Contrary to popular myth, there has never been a wine sold under the name Mad Dog.
Got me some Mad Dog last night and got fucked up.

There's a new flavor of Mad Dog called Buck Bunny and it's licorice! Nasty!

Red Grape Mad Dog is 18% alcohol.
by Dr. Badwrench May 27, 2007
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cheap liquor, that may cause you to have violent actions or outburst which is what MD (mad) (dog) 20/20 alchol content.
Burn'a'Nugg favorite liquor.
by burnanugg December 8, 2003
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Someone who, during the course of a conversation or debate, becomes increasingly agitated and ends up ranting and raving.

The best way of tipping such a person over the edge is to start chanting "mad dog, mad dog, mad dog", in unison, quietly at first but growing in volume while tapping your nails on the table top. This will guarantee an hilarious end to the conversation.
Derek, a notorious mad dog screamed: "LOOK, YOU'RE MISSING THE POINT!....".
by Lee Farmie October 15, 2004
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the nickname of one of the greatest white NBA players of all-time Mark Madsen
Look at Mad Dog strut down the court after that dunk!
by mike July 27, 2004
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Slang word for the drug MDMA, so called because it has the tendancy to turn you into a slavering, but friendly, alsatian.
You should have seen Ben, he was gurning his tits off on mad dog
by Dwaine Howe July 12, 2008
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When a person mad dogs you,they stare at you in a mean way.
I usually get mad dogged by all the fuckin haters.
by Deno Saenz December 14, 2005
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