
No PROBLEM. Bye.
The Big Bang Theory Season 1, Episode 3

What's the PROBLEM?
The Big Bang Theory Season 4, Episode 22

That skank's your PROBLEM, not mine.
The Big Bang Theory Season 6, Episode 3

Foot-pound has the same PROBLEM.
That's a unit of work, not of weight.
The Big Bang Theory Season 1, Episode 17

Like you said, he's the PROBLEM.
He's always been the PROBLEM.
Breaking Bad Season 3, Episode 13