
Yes. Buck up.
The Big Bang Theory Season 5, Episode 1

...but I'd rather swim BUCK naked
across the Ganges...
The Big Bang Theory Season 3, Episode 4

You're intimidated by Amy's intellect.
To that, I say BUCK up.
The Big Bang Theory Season 4, Episode 3

There's gotta be other ways
you can make a quick BUCK.
The Big Bang Theory Season 10, Episode 17

Buck up, sissy pants.
The Big Bang Theory Season 5, Episode 1