
I've bounced many a RUBBER ball
in my day.
The Big Bang Theory Season 5, Episode 17

Like when it turns out
she's made of RUBBER,
The Big Bang Theory Season 7, Episode 20

The pencil's RUBBER.
The Big Bang Theory Season 4, Episode 18

Not the brush part.
Just the little RUBBER thing...
The Big Bang Theory Season 4, Episode 6

and you break out the hot
lights and the RUBBER hose.
The Big Bang Theory Season 11, Episode 13