“Hell hath no fury”

PARIS: Thank you for the “where to make out” list, I just need to get my books.
LOUISE: Hell hath no fury.

Louise is referencing the very well known phrase, “Hell hath no fury like a woman scorned”. It comes from the 1697 tragedy The Mourning Bride by English playwright William Congreve. The exact quote is: “Heav’n has no Rage, like Love to Hatred turn’d/Nor Hell a Fury, like a Woman scorn’d”.

Louise is saying (accurately) that Paris is only angry because Tristan prefers another girl to her.