- You can't do that.
- Can too.
- Cannot. Stamped it.
- Can too. Double-stamped it. No erasies.
- Cannot. Triple-stamped it. No erasies. Touched blue. Make it true.

8 seconds sound clip from the Dumb and Dumber movie soundboard.

You can hear this line at 00:42:06.574 in the Blu-ray version of the movie.

Quote context

[...]

- Keep your shirt on. I gotta squeeze a lemon.

- Hey, hey, hey. Here they come. Stay down, stay down!

- Say, are you guys going to Davenport? My car died, and I'm late for a luncheon.

- We usually don't pick up hitchhikers, but I'm going to go with my instinct on this one. Saddle up, partner.

- You're it.

- You're it.

- You're it!

- Quitsies!

- Anti-quitsies.

- You're it.

- Quitsies. No anti-quitsies. No startsies.

- You can't do that.

- Can too.

- Cannot. Stamped it.

- Can too. Double-stamped it. No erasies.

- Cannot. Triple-stamped it. No erasies. Touched blue. Make it true.

- You can't triple-stamp a double-stamp! You can't triple-stamp a double-stamp, Lloyd! You can't triple-stamp a double-stamp. Lloyd! Lloyd!

- Guys! Enough!

- Hey, you wanna hear the most annoying sound in the world?

(LLOYD SCREECHES)

[...]