Jennifer Aniston appeared on ABC's Jimmy Kimmel Live! Monday, and at one point, the actress was joined by her former co-star and real-life BFF Lisa Kudrow. Sadly, they weren't staging another Friends reunion. Instead, they competed in a celebrity curse-off, judged by—who else?—host Jimmy Kimmel.
"If you're faint of heart, I'd like to ask you to cover your ears," Kimmel warned viewers.