...to provide Amy with conversation
and CASUAL physical contact.
The Big Bang Theory Season 6, Episode 1
There's a difference
between CASUAL and weird.
The Big Bang Theory Season 11, Episode 8
No, I'm all done with CASUAL sex.
The Big Bang Theory Season 2, Episode 2
is that what we had was something CASUAL.
Money Heist Season 3, Episode 8
...and engage in CASUAL physical contact...
The Big Bang Theory Season 6, Episode 1