TV series example of the word

The Big Bang Theory Season 7, Episode 7
I can't wait until I get a rash.

The Big Bang Theory Season 4, Episode 6
Uh, rash. That's a bad rash.

The Big Bang Theory Season 7, Episode 14
And I told you I get diaper rash!

The Big Bang Theory Season 7, Episode 13
before making any rash...

The Big Bang Theory Season 7, Episode 24
Whatever you do, just don't make any rash decisions.