If I would say, look at Reggie's gums and teeth. Looks like his mother had an affair with Mister Ed.

6 seconds sound clip from the The Nutty Professor (1996) movie soundboard.

You can hear this line at 00:46:11 in the Blu-ray version of the movie.

Quote context

[...]

- I'm sorry, man. It's just that you're so funny.

- You're so funny the way you take a person's personal defects and flip it around. Like you pick somebody in the room and say, 'look at your foot, and everybody look at it and start laughing.

- That's some funny shit, man. You're on your way! You going to the top! You're the next Lenny Bruce, man! Crazy!

- Why, thank you. Thank you very much. I'm glad you appreciate Reggie's show.

- That'd even work with me doing it to you, Reggie. Yes, it would.

- If I would say, look at Reggie's gums and teeth. Looks like his mother had an affair with Mister Ed.

- See? Everybody's laughing. 'Cause they can visualize your mother in a barn with mister ed, talking about...

- Look what I'm doing, Wilbur. Look at me!

- You snapping on me? Are you snapping on Reggie?

- It's your teeth, I don't know whether to smile at you or kick a field goal, man.

[...]