That's not what your friends say.
2 seconds sound clip from the Frosty Returns (1992) movie soundboard.
You can hear this line at 00:05:55.333 in the DVD version of the movie.
Quote context
[...]
- The name's Frosty. And yours?
- You must be thinking of somebody else. I'm not famous. And not a very good magician.
- That's not what your friends say.
- I don't have any friends. Except for Charles.
- One friend is a lot different than no friends, kid. One friend is plenty.
- Huh? Like say, a snowman doing a cartwheel? Or singing Puccini? Or maybe dancing a mean mambo?
[...]