Here's the official website.
Here's a Wiki writeup.
It's about three guys who own a bar in a bad section of Philadelphia and the twin sister of Dennis.
The plots are mostly very un-PC.
Danny DeVito's character came in in season two. They were going to be canceled after season one unless they could get a star to join the cast. When Rob McElhenney asked DeVito to do it he found out DeVito was already a fan.
The three guys are relative unknowns and write all the scripts together. They are good friends. The girl who plays the character "Sweet Dee" is Kaitlin Olsen. People who watch Curb Your Enthusiasm will recognize her as Chery's sister.
Anyhoo, check it out. I'm sure a lot of people here are fans.
In one episode Sweet Dee and her brother Dennis try to get welfare by Dennis claiming he's a crack addict and his sister is retarded.
