Dennis: You are dressed like the Phantom of the Opera. He's not a vampire.
Charlie: He eats theater people.
Denis: No, he doesn't.
Mac: I think he might.
Frank: He does.
Dennis: Do you even know who the phantom of the opera is?
Mac: He might not.
Frank: He doesn't.
Charlie: I don't.

Dennis: It's fatness, plain and simple. It's a person becoming fat before your very eyes.
Charlie: And I don't even know how to make the bird jokes anymore. They no longer apply.
Dee: I'm not fat, I'm pregnant!
Mac: I feel like you say that all the time now.
Frank: You better do yourself a favor and flush it out.
Charlie: Wait a second, you definitely said that before.
Mac: Since we're all saying things we say all the time. I'll just reiterate. Dee, we don't care about you, or your body, or that baby bird.

Dee: Just so I'm clear, you don't actually think things are going to come alive because you're spending the night in museum, right?
Dennis: I'm sorry, we're simply opening ourselves up to the possibility of an amazing adventure this evening. Is there something wrong with that? Whether that means Charlie running into his ancient spirits or us running away from security guards all night, it's gonna be a really great time.

Dennis: I'm a fixer, Frank. It's what I do.
Frank: You're good. we should hang out more.
Dennis: Stop trying to bond with me.

Dennis: Mrs. Mac has a unique and earthy fragrance.
Mrs. Mac: I smell like shit.

Frank: Deandra will take care of me.
Dennis: Dee's not gonna take care of you. You just chased her out of here with a pool cue because she had a little cough.

Dennis: I'm jumping in the pool!
Frank: Plus, I'm gonna piss in it!

I have a proposition too. Why don't you walk in front of me so I don't get your blood all over my feet?

Dennis: Where'd you get that towel? I don't see any attendants around.
Frank: I borrowed it fringe style from that guy over there. I gave him a bite of my hot dog, he's letting me use his towel.

Dennis: You're born into class. It's about pedigree. It's about upbringing. It has nothing to do with your present circumstance.
Dee: See, Dennis and I were born upper class. Therefore, we currently are and will forever remain upper class. Frank, stop picking your teeth for one second and back us up here.

These guys are more barnacle covered and sunburnt than Dee and Frank.

Charlie: We'll scrape all these delicious oysters or whatever off the side of the pot and we'll put them in a pot and boil them before you get back.
Frank: We'll cook them for you.
Dennis: Those are barnacles. Do not eat those. Do not cook them in a pot and serve them to us.

It's Always Sunny Quotes

Charlie: I'll totally pull a Good Will Hunting on those kids and that'll put them in their place.
Mac: How you gonna do that?
Charlie: Well, you've seen the movie right?
Mac: Yeah.
Charlie: So all I gotta do is, I'll ask them some big shot, like math or science, history-type college question aand that will totally stump them by knowing a lot more about the answer than they do.
Mac: In that movie, Matt Damon played a genius janitor, you're just a janitor.
Charlie: Right, you stumped me with that one.

Mac: He doesn't have any poison.
Charlie: I don't have any on me, but I do keep some in my fridge at home in the relish jar.
Frank: There's poison in that jar? I thought I was allergic to pickles. What's in the jar with the skull and crossbones?
Charlie: Well that's mayonnaise. It's a decoy.
Frank: And the mayo?
Charlie: That's shampoo.
Frank: You're telling I've been putting shampoo on my sandwiches?
Charlie: If you've been using the mayonnaise, then yeah, probably.