
...she licked her THUMB
to remove raspberry jelly...
The Big Bang Theory Season 4, Episode 3

No. But your THUMB does.
The Big Bang Theory Season 5, Episode 16

What happened
to your THUMB?
The Big Bang Theory Season 5, Episode 16

If I'm going to jail, I'm killing him,
not breaking his THUMB.
The Big Bang Theory Season 9, Episode 14

General rule of THUMB,
Game of Thrones Season 7, Episode 3