
I ate a BUTTERFLY.
The Big Bang Theory Season 5, Episode 18

If Sheldon's testosterone dipped,
he'd become a BUTTERFLY.
The Big Bang Theory Season 9, Episode 21

That's what you said about the
BUTTERFLY pavilion at the zoo.
The Big Bang Theory Season 12, Episode 6

...I have burst forth
as the world's smartest BUTTERFLY.
The Big Bang Theory Season 8, Episode 1

I'm a BUTTERFLY.
The Big Bang Theory Season 12, Episode 6