A thirty minute power nap that also includes masterbation.
Dude, I need a dirty thirty before we go out tonight!
by partytime2009 December 23, 2009
19 more definitions
Top Definition
The age at which single women without children realise that their biological clock is ticking, As a consequence they may lower their standards and increase their willingness to perform sexual acts as a matter of desperation in order to find a mate/sexual partner. They may also attempt to hook up with younger males as an attempt to elongate their youth.

The expression almost always refers to women, as men are thought to always be in this state.
"Lets go to club x and pull some dirty thirties..."
by MacTheKinife February 24, 2010
A thirty pack of beer! Ususally Keystone!
Hey man we drank a dirty thirty! Right On.
by C-MART September 27, 2005
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
The neighborhoods of 30th - 39th Avenue located in East Oakland CA. Home to perhaps the largest Latino community in Oakland as it's streets are commonly filled with Mexican Reastaraunts, Taquerias, Taco Trucks, Panaderias, and Mexican Supermercados.
What it do? You wanna hit up the dirty thirties tonight holmes?
by Blasphemous[Deity] June 28, 2006
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
A sexual act performed by one girl, thirty guys and a merry-go-round. To do this, the girl kneels on the edge of the merry-go-round and the merry-go-round is given a swift spin. As the merry-go-round spins, the girl then gives head to each male in the circle, creating a seemingly endless circle of blow jobs.
Jimmy: Hey, did you get the dirty thirty?
Leo: No, I can't drink, there are exams this week.
Jimmy: No, I mean the dirty thirty from Nafer.
by sweetlou69 April 23, 2010

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