When a woman reaches the age of 30 and becomes an insatiable nymphomaniac.
Susie hit her Dirty Thirty, and now there's no stopping her!
by coryn_wants June 22, 2011
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A thirty milligram oxycodone pill that has been pressed with unknown chemicals. Often cheaper than oxy’s from a script as you can tell they’re not from an industrial press.
Aye you got those dirty thirty’s?
I got some dirty thirty’s for the low.
by Bigballer69123 October 5, 2020
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A case of Keystone Light beer. 30 cans... Popular at high school and college parties because of the beverage's affordable cost in comparison to other beers. The term "dirty thirty" was coined in reference to the beer's lackluster if not downright "dirty" taste, and quantity of 30 cans of beer in the package. Despite its shortcomings, eager drunkards across the great u.s. of a. are willing keep their costs down on the shillings to shitfaced (s.t.s.) ratio scale so that the former number can be achieved for a lower price.
"Hey Tom's house is open tonight. I'm going to swing by the Shell and pick up a dirty thirty."

"Alright Ladies, this dirty thirty is on the house!"
by mr.toyota December 10, 2007
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A thirty minute power nap that also includes masterbation.
Dude, I need a dirty thirty before we go out tonight!
by partytime2009 December 24, 2009
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Dude, I drank a whole dirty thirty last night -or- Wanna get a dirty thirty?
by sarah515valleyjunctioncrew March 23, 2004
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Someone lays in the pre-anal sex posistion and spreads their cheeks while a very friendly companion pours a double shot of tequila into their gaping void. After thirty minutes of holding the shots inside of their rectum, the companion places their lips around their partner's anus as they fart the shot of diahquila into their welcoming mouth.
My poop shoot hurts from the Dirty Thirty last night!
I've been backed up for a week from the Dirty Thirty!
by martinswiggart January 25, 2008
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A drinking game (originating in Upstate NY/Capital District area).

Usually played, just prior, to heading out to the bars & clubs (A.K.A. "pre-game drinking" or "pre-gaming").

RULES: using an egg timer, or clock... every participant drinks a completely full shot glass of beer every minute, on the minute.

This game is used as an easy way to get a quick "buzz"... yet difficult (for some) due to the constant smaller quantities of alcohol, timing, and aeration of the beer.

SEE: "Power Hour" for a longer version of this game.
Person A: "Let's head out to the bars!"
Person B: "No. Let's watch the end of the game, then head out to the bars."
Person C: "I want a good buzz before we leave..."
Person B: "Let's do a Dirty Thirty, then head out to the bars!"
by meatomatic May 14, 2009
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