Oh, yes, I've had smelly ones before, but your son is by far the smelliest.
5 seconds sound clip from the Big Daddy movie soundboard.
You can hear this line at 00:59:20.940 in the Blu-ray version of the movie.
Quote context
[...]
- Your boy's making the least progress of any of the children in the class.
- And, frankly, his personal hygiene is becoming a cause for concern.
- Oh, yes, I've had smelly ones before, but your son is by far the smelliest.
- All right, I got you, ma'am. Take it easy. What do you think I should do?
- Well, you might start by paying more attention to his schoolwork.
- Okay.
- You should do what you can to help him.
[...]