
You know if you stay up all night,
you're going to be SLEEPY tomorrow.
The Big Bang Theory Season 6, Episode 22

And a SLEEPY Sheldon is a cranky Sheldon.
And a cranky Sheldon...
The Big Bang Theory Season 6, Episode 22

Happy kitty, SLEEPY kitty
The Big Bang Theory Season 6, Episode 22

We were. The kids
got SLEEPY.
The Big Bang Theory Season 12, Episode 19

Happy kitty, SLEEPY kitty
The Big Bang Theory Season 1, Episode 11