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'The One With the Soap Opera Party' - After Rachel lies about not going to the soap opera party.
Monica: "Okay, then why are you all dressed up?"
Rachel: "When you're sick you do whatever you can to make yourself feel better."

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'The One With the Breast Milk' - After Monica went shopping with Julie: "Oh, I’m sorry. Did my back hurt your knife?"

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'The One Where Monica Gets A Roommate' - Talking to her dad after she runs away from her wedding: "Well, maybe I don’t need your money. Wait. I said maybe."

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'The One With All the Kissing' - On regretting her choice to go to London: "You know what? I just shouldn't be allowed to make decisions anymore."

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'The One in Vegas' -

After waking up to find that Ross drew on her face while she was sleeping: “Ross, I am a human doodle!”

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'The One With the Fake Party' - When she invited Chandler to sit with her.

Rachel: "You're a pathetic loser, right?"
Chandler: "Oh yeah."

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'The Proposal' - Her reaction to Monica and Chandler getting engaged: "I'm probably 98% happy and 2% jealous."

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'The One With Rachel's Crush' - Complaining about her retail job: "I’m quitting, I just helped an 81-year-old women put on a thong and she didn’t even buy it!"

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'The One With Rachel's Other Sister' - Responding to her sister's claims that she's now a decorator: "You decorate dad's office and now you're a decorator? Okay, I went to the zoo yesterday. Now, I'm a koala bear."

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'The One Where Rachel Is Late' - At the end of her pregnancy when Rachel is getting irritable: "That's a great story. Tell it while you're getting me some iced tea."

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'The One Where Phoebe Runs' - On describing Phoebe's running style: "I swear when she runs she runs like a mix between Kermit the Frog & the Six Million Dollar Man."

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'The One With Ross's Library Book' - When Joey starts to get serious about a girl: "Please don't get married before I do."

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'The One With the Jellyfish' - After having a big fight with Ross: "It's not that common, it doesn't happen to every guy and it is a big deal."

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'The One with Barry and Mindy's Wedding' - "You know what, Bare, I'm not gonna leave, because I promised myself I'd make it through at least one of your weddings."

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'The One With George Stephanopoulos' - "Everyone I know is either getting married or getting pregnant or getting promoted, and I'm getting coffee! And it's not even for me!"

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'The One With Chandler In a Box' - After Ross is giving her a hard time about returning gifts for store credit: "Va fa napoli."

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'The One Where Ross Can't Flirt' - As Chandler is trying to understand flirting with other people while in a relationship.
Chandler: "Rachel, when you were going out with Ross, did it bother you when he flirted with other women?"
Rachel: "No, no, it bothered me when he slept with other women."

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'The One With the Secret Closet' - After Ross says that some women don't even feel Braxton-Hicks contractions: "No uterus, no opinion."

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'The One With All the Cheesecakes' -

After she and Chandler have been stealing someone else's cheesecakes: “We are dessert stealers. We are living outside the law.”

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'The One Where Rachel Has a Baby' - Ross: "You know what I think it is? I think you made such a nice home for her over the last nine months that she just doesn't want to leave."
Rachel: "Aw, look at you makin' up cr*p for me."

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'The One With Ross’s Inappropriate Song' - After singing 'Baby Got Back' to her daughter, Emma: "You really do like big butts, don't you... oh, you beautiful little weirdo."

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'The One Where Monica Gets A New Roommate' - On how she's going to earn money: "I'm gonna go get one of those job things."

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'Ross Finds Out' - Rachel drunk calling Ross to say she's over him: "I am over you and that, my friend, is what they call closure."

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'The One With Rachel's Big Kiss' - After Phoebe says she's too "vanilla" to have kissed another woman: "Vanilla? I'm not vanilla. I've done lots of crazy things. I mean I got drunk and married in Vegas."

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'The One With the Joke' -

When Joey starts working at Central Perk so she gives him advice: "Let me tell you about a couple of things I learned while working at the coffee house. First of all, the customer is always right. A smile goes a long way. And if anyone is ever rude to you: sneeze muffin."

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'The One With Unagi' - Her response after scaring Ross who claims to have "unagi": "Ahh, salmon skin roll."

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'The One with the East German Laundry Detergent' -

On trying to become more independent by doing her laundry: "You know what I figure, if I can do laundry, there's nothing I can't do."

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'The One with George Stephanopoulos' - Upon receiving her first paycheck: “Who’s FICA and why is he getting all of my money?”

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'The One Where Ross Is Fine' - "Oh, that's okay, girls tend not to like me."

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'The Last One' -

And, of course, one of the most memorable quotes of the whole series: "I got off the plane."

See also: The wildest 'Friends' fan theories out there

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