It's only Tuesday, but we have a feeling this is going to be our favorite celebrity video of the whole week!

Jennifer Aniston and BFF/former Friends co-star Lisa Kudrow appeared on Jimmy Kimmel Live last night to promote their newest projects, but who cares about that when you have both of the ladies pitted against one another in the Celebrity Curse Off game?!

We'd never seen the segment before, but it's pretty simple: Each contestant is given five seconds to come up with an obscene word/term, and if it can't be bleeped (or if they can't come up with one in time) they lose.

From everyday f-bombs to terms that made us scratch our head, the ladies swapped quite a few foul phrases, but out favorite might have been from Aniston in the last minute of the clip. We're not going to tell you what it was, but we never thought we'd hear her say something so dirty!