Big Bang Theory Quote
Sheldon: My problem is that I don't always know when I've gone too far.
Leonard: Well, if you like, I could try to help you out. You know, maybe let you know if you're crossing a line.
Sheldon: Oh, you mean like with a code word?
Leonard: Sure. How's "Shut up"?
Sheldon: That's perfect. People say it to me all the time. No one will suspect.
Quote from S12E18 - The Laureate Accumulation