Dennis Reynolds is one of the owners of Paddy's in Always Sunny in Phildelphia.  Dennis owns the bar along with his childhood friends Mac and Charlie.  Dennis comes from a very privileged upbring thanks to his rich father Frank.  He definitely peaked in high school where he was considered popular.  Despite graduating from the University of Pennsylvania, he seems content to run Paddy's his whole life.

Dennis Reynolds Quotes

Dennis: It's because of those bison fingers.
Dee: I do not have bison fingers!
Frank: Yeah you do. Your mother had to have a c-section because of those hands.

Dee: Who slams a door?
Frank: Babies.
Dennis: That guy has some real growing up to do. Have some repect for Christ's sake... I am legend.

It's Always Sunny Quotes

Frank: I opened up to a therapist just once. I was a kid. I got into a fight. The doctor asked me question after question, got me so scrambled up. Next thing I know, I was shanghai'd upstate to a nitwit school. You know what a nitwit school is?
Therapist: I assume you mean a school for the mentally disabled.
Frank (spits pistachio shell): Yeah, not just for nuts in the head, but bodies, too. Back then science was real crude, they stuck us all together. My roommate was a frog-kid. You ever see a frog-kid?

No I don't eat dragon, cause, uh, it's not a meal for peasants, it's a meal for kings, and I'm sort of a common man. But they don't eat us, it's a common misconception. They actually eat gold and treasure -- that's why they're always sitting on a pile of it.

Charlie