No, I'm all done with CASUAL sex.
The Big Bang Theory Season 2, Episode 2
I'm striking up a CASUAL conversation
with you.
The Big Bang Theory Season 2, Episode 9
Well, it's very CASUAL. No dress code or...
The Big Bang Theory Season 2, Episode 10
I've extended a friendly,
CASUAL greeting.
The Big Bang Theory Season 3, Episode 10
...and engage in CASUAL physical contact...
The Big Bang Theory Season 6, Episode 1