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

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

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

Happy kitty, SLEEPY kitty
Purr, purr, purr
The Big Bang Theory Season 10, Episode 20

Really? You'll risk getting SLEEPY...
The Big Bang Theory Season 4, Episode 6