If Sheldon's testosterone dipped,
he'd become a BUTTERFLY.
The Big Bang Theory Season 9, Episode 21
I ate a BUTTERFLY.
The Big Bang Theory Season 5, Episode 18
I'm a BUTTERFLY.
The Big Bang Theory Season 12, Episode 6
There are the Green Parrots,
the Butterfly, the PMF1...
Money Heist Season 3, Episode 3
...I have burst forth
as the world's smartest BUTTERFLY.
The Big Bang Theory Season 8, Episode 1