Amy: I believe a misunderstanding may have occurred when I asked you to meet my mother.
Sheldon: No misunderstanding. I've learned what that request actually means, and I don't want to be joined to another object by an inclined plane wrapped helically around an axis.
Amy: In what way are you screwed?

Amy: I trust this clarification allows us to return to boy-slash-friend-slash-girl-slash-friend status.
Sheldon: Of course. Would you like to join me for Chinese food?
Amy: Sheldon, please, you're suffocating me.
Sheldon: My apologies. Good night, Amy.
Amy: Good night, Sheldon.

Penny: How's your life?
Amy: Like everybody else's, subject to entropy, decay and eventual death. Thank you for asking.

Amy: I must take responsibility, I had to stop for feminine hygiene supplies.
Leonard, Raj, Wolowitz: Oh, oh, ok.
Sheldon: I believe she's experiencing her menses.
Amy: Actually, I'm not. In order to avoid surprises, I wear them all the time.

Sheldon: I brought Amy here to show her some of the work I'm doing.
Amy: It's very impressive, for theoretical work.
Sheldon: Do I detect a hint of condescension?
Amy: I'm sorry, was I being too subtle? I meant compared to the real-world applications of neurobiology, theoretical physics is - what's the word I'm looking for? Hmm, cute.
Sheldon: Are you suggesting the work of a neurobiologist like Babinski could ever rise to the significance of a physicist like Clerk Maxwell or Dirac?
Amy: I'm stating it outright. Babinski eats Dirac for breakfast and defecates Clerk Maxwell.

Amy Farrah Fowler (text message): I don't care for perchloroethylene, and I don't like glycol ether.

Amy: I don't object to the concept of a deity, but I'm baffled by the notion of one that takes attendance.