I'll thank you to leave Christmas out of this.
2 seconds sound clip from the Meet Me in St. Louis (1944) movie soundboard.
You can hear this line at 01:21:10.559 in the DVD version of the movie.
Quote context
[...]
- Is there anything wrong with you going with your own brother?
- And be the laughingstock of St. Louis?
- Katie's right. That solves all of our problems.
- And besides, it's so full of the spirit of Christmas.
- I'll thank you to leave Christmas out of this.
- Oh, Lon, it's our last Christmas dance in St. Louis and it'd be tragic if either of you missed it.
- It's all right for you to talk. You have a date. A real one.
[...]