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

If I wanted to, I could wipe it out
with my THUMB like a god.
The Big Bang Theory Season 6, Episode 21

I had lost a lot of THUMB blood.
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

You know,
Italian housewives have a rule of THUMB:
The Big Bang Theory Season 2, Episode 9