Oh, don't worry. He made us pinky SWEAR
we'd keep it a secret.
The Big Bang Theory Season 10, Episode 20
and teaches them SWEAR words
The Big Bang Theory Season 12, Episode 3
Did you pinkie SWEAR?
The Big Bang Theory Season 4, Episode 6
That is my girlfriend!
I SWEAR to God!
The Big Bang Theory Season 7, Episode 1
I'd SWEAR you my sword,
Game of Thrones Season 6, Episode 10