Rubbing it in someone's face.
The Big Bang Theory Season 7, Episode 6
Well, if we're RUBBING genitals on things,
that's where I shine.
The Big Bang Theory Season 10, Episode 10
That's just RUBBING alcohol.
The Big Bang Theory Season 3, Episode 3
Why are you
RUBBING your hands together?
The Big Bang Theory Season 7, Episode 4
Keep RUBBING.
The Big Bang Theory Season 1, Episode 11