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8.
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
 
9.
The age in which it becomes socially unacceptable for a man to ogle and hit on any female under the age of 20. Its just creepy to see a dirty old man (age 30 and over) salivating over a hot young thing (less than 20 years old)!
It didn't bother me so much when Bill was 29 and hitting on the hot little 19 year-olds, but now that he is dirty thirty, it is just sad to watch.
by E.J.K. January 26, 2008
 
10.
Thirty pack of "Miller High Life" cans.
Dude, I drank a whole dirty thirty last night -or- Wanna get a dirty thirty?
by sarah515valleyjunctioncrew March 23, 2004
 
11.
Noun, South Side Chicago: 1. A $30.00 eighth of cheap weed, invariably containing many seeds and stems; 2. Nick Swisher, player for the Chicago White Sox, who is in possession of both the fire and the passion.
"You pick up some dank tonight?"

"Nah, just a dirty thirty. It's straight, though."

--

"Fuck yeah! Dirty 30 just doubled to left!"

by Red Line Mike May 14, 2008
 
12.
A case of pure genuine Old Style Light.
Me and the boys tackled a dirty thirty before going to the bars the other night.
by ossil May 30, 2005
 
13.
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 24, 2008
 
14.
When you and a friend split a 30-rack of any beer, and split a white castle crave case 30-pack.
Don't do it the next morning I threw up pink balls?!?!?!
by cam_fash March 07, 2005