Yeah, no, there's a new policy:
No shoes, no SHIRT, no Sheldon.
The Big Bang Theory Season 2, Episode 7
without a SHIRT on, you'd die.
The Big Bang Theory Season 12, Episode 18
Well, my SHIRT.
The Big Bang Theory Season 3, Episode 12
...Leonard would never go swimming
in public without his swim SHIRT.
The Big Bang Theory Season 8, Episode 9
While you're at it,
why don't you lift your SHIRT up,
Breaking Bad Season 5, Episode 16