
That's very UNLIKELY, Mrs. Koothrappali.
The Big Bang Theory Season 2, Episode 23

...their love seems UNLIKELY
and doomed to failure.
The Big Bang Theory Season 8, Episode 7

A decryption key needed
only in the UNLIKELY event
Westworld Season 2, Episode 7

Unlikely.
Game of Thrones Season 7, Episode 3

becoming UNLIKELY friends.
The Big Bang Theory Season 7, Episode 10