
You SCRATCH my back, I SCRATCH yours.
The Big Bang Theory Season 2, Episode 16

Okay. Scratch paper, check.
The Big Bang Theory Season 11, Episode 13

Or on a SCRATCH piece of paper
somewhere?
Breaking Bad Season 3, Episode 13

Okay, so SCRATCH Kobayashi.
The Big Bang Theory Season 12, Episode 18

made entirely from SCRATCH?
The Big Bang Theory Season 11, Episode 11