
I'm stopping by to see my ex-girlfriend
because she's having a TOUGH time,
The Big Bang Theory Season 9, Episode 18

Well, it's TOUGH to say, since it's hot.
The Big Bang Theory Season 3, Episode 17

It's getting TOUGH for me
to be on my feet all day.
The Big Bang Theory Season 10, Episode 10

This is TOUGH.
The Big Bang Theory Season 10, Episode 9

Quite TOUGH.
Money Heist Season 1, Episode 10