Watch Jennifer Aniston And Lisa Kudrow Have A F---ing Filthy 'Friends' Reunion

Could these two 'be' any more filthy?

Rachel Green and Phoebe Buffay definitely got into their fair share of trouble on "Friends," but they certainly never used the type of potty-mouth language that Jennifer Aniston and Lisa Kudrow threw out on "Jimmy Kimmel Live" last night (November 24).

The actresses -- who are starring in "Horrible Bosses 2" and "The Comeback" respectively -- bravely competed in Kimmel's famous "Celebrity Curse Off," where they each had five seconds per round to come up with cusses like "dick licker," "holy f--- balls," and "s--t for brains."

Adorably, Aniston almost lost it when Kudrow threw out "f---ing s--t," -- because "she used to say it all the time" on the "Friends" set -- but she quickly pulled it back together with a dirty Greek no-no word. (Another highlight was Kudrow throwing out the classic "ch--d," then blaming her son for her knowledge of the word.)

Check out the full, NSFW-ish game below, but be warned -- you may never look at Aniston the same way after she throws out "undercarriage eater":

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