Dennis: We also have the bird with teeth.
Charlie: Wow, okay. And I'm assuming the teeth are fake, yes?
Dennis: Yes. Well they're not really human teeth if that's what you're asking
Charlie: No, I mean did you discover a bird with teeth in this fashion?
Dennis: That does not exist in nature.
Charlie: Okay, I'm not sure, but either way, good glue work.

Charlie: what is your spaghetti policy?
Dee: Are you hearing this? He doesn't belong in a place like this.

They're third dimension glasses. I don't really think they're working because I'm still seeing things in whatever dimension we live.

Charlie: What's 3D even stand for?
Dee: Third dimension.
Charlie: What dimension are we in?

Frank: He's been obsessing about this luau thing since we met Duncan under the bridge.
Dennis: My first instinct when you say you meet people under bridges is to berate you.

Charlie keeps a book of dreams and inspirations. They're mostly in pictures and symbols.

Frank

Mac: This brings me no joy at all. I feel nothing. I feel like you stole money from me and bought a shirt.
Dennis: With your money. That is what happened.

Charlie: Dee, if I go to a movie or a spaghetti place with you, out there I'm the rat.
Dee: What if I guarantee no one out there will put you into a bag and bash you against a telephone pole? Would that comfort you at all?
Charlie: No, that's a guarantee you can't make, Dee.

Dee: You've been really stressed so I thought I'd take you to a spa day. Just the two of us.
Charlie: A what day?
Dee: Spa day
Charlie: What is this word, spa? I feel like you're starting to a say a word and you're not finishing it. Spaghetti? Are you taking me to a spaghetti day?

Charlie: It's like whole generations of those things have died at my hands. Mothers, fathers, grandfathers, little baby rats.
Dee: Well, you know, keep up the good work.
Charlie: Sometimes, I wonder though, if our lives are reaaly more valuable than theirs. You know what I mean?
Dennis: Yeah they are. Our lives definitely are without a doubt.

It's Always Sunny in Philadelphia Season 6 Episode 10 Quotes

Dee: You've been really stressed so I thought I'd take you to a spa day. Just the two of us.
Charlie: A what day?
Dee: Spa day
Charlie: What is this word, spa? I feel like you're starting to a say a word and you're not finishing it. Spaghetti? Are you taking me to a spaghetti day?

Charlie: It's like whole generations of those things have died at my hands. Mothers, fathers, grandfathers, little baby rats.
Dee: Well, you know, keep up the good work.
Charlie: Sometimes, I wonder though, if our lives are reaaly more valuable than theirs. You know what I mean?
Dennis: Yeah they are. Our lives definitely are without a doubt.