The Dirty Thirty 

Refers to the thirty seconds of free adult entertainment often offered at hotels.

Greg, Erik, Matt, and Daemon were dissapointed that The Dirty Thirty in their hotel room didn't involve any action. They later realized it was because the couple wasn't knocking boots they were making love.

The Dirty Thirty by Game Scoop super friend October 26, 2009

The Dirty Six-Thirty

An area code belonging to the western Chicago suburbs refered to by residents as "the dirty six-thirty". Towns included in the 630 include: Addison, Aurora, Bartlett, Batavia, Bensenville, Bloomingdale, Bolingbrook, Carol Stream, Clarendon Hills, Darien, Downers Grove, Elmhurst, Geneva, Glen Ellyn, Glendale Heights, Hanover Park, Hinsdale, Itasca, Lemont, Lisle, Lombard, Naperville, Oak Brook, Oswego, Roselle, St. Charles, Streamwood, Villa Park, Warrenville, West Chicago, Westmont, Wheaton, Willowbrook, Winfield, Wood Dale, Woodridge, Yorkville.

It's a virtual Sodom and Gomorrah.

You gonna hook up tonight? Fo' shizzle she's from The Dirty Six-Thirty... A-town (Aurora).

The Dirty Six-Thirty by Indy's brother October 19, 2010

the dirty seven thirty 

having sex with seven men and or women at the same time

can't wait to turn the dirty seven thirty around

the dirty seven thirty by Cracker Jack Jones December 29, 2010