...this mean little skull,
or Kermit the Frog.
The Big Bang Theory Season 3, Episode 3
Well, I'm sorry
I'm not a FROG.
The Big Bang Theory Season 12, Episode 17
Or you're just
a tall, annoying FROG.
The Big Bang Theory Season 7, Episode 16
...the one where the FROG has its tongue
stuck to the underside of an airplane.
The Big Bang Theory Season 6, Episode 19
Or you're the FROG who's
been kissed by a princess
The Big Bang Theory Season 7, Episode 16