It's like me CHALLENGING you
to a sexy pants contest.
The Big Bang Theory Season 8, Episode 19
Being your girlfriend is so CHALLENGING.
The Big Bang Theory Season 8, Episode 24
- Just as CHALLENGING.
- Yes.
The Big Bang Theory Season 10, Episode 5
but the truth is,
Amy is just as CHALLENGING.
The Big Bang Theory Season 10, Episode 5
Oh, we'll make the puzzles
extremely CHALLENGING
The Big Bang Theory Season 9, Episode 8