That's not true.
1 seconds sound clip from the Meet Me in St. Louis (1944) movie soundboard.
You can hear this line at 01:20:32.174 in the DVD version of the movie.
Quote context
[...]
- A girl has got a right to go to the dance with anyone she wants. I just didn't ask her soon enough.
- Everyone knows she's just an Eastern snob.
- I'll thank you to keep Miss Ballard's name out of this.
- Look who's talking. You're sulking just because Warren Sheffield didn't ask you to the dance.
- Rose turned down literally scads of dates. She could have had any man she wanted.
- Hah! This is what I call real Christmas spirit!
- You two have spent this entire vacation at each other's throats.
[...]