
His DIET is rich in fatty deli meats.
The Big Bang Theory Season 6, Episode 9

But trust me,
you don't want it for a steady DIET.
The Big Bang Theory Season 2, Episode 4

Diet Coke, please.
Breaking Bad Season 2, Episode 11

Sure. Take a Diet Coke, thank you.
Of course.
Breaking Bad Season 4, Episode 7

How hard is 65% Coke,
35% Diet Coke?
The Big Bang Theory Season 12, Episode 23