Stop that grunting.
4 seconds sound clip from the It's a Wonderful Life (1946) movie soundboard.
You can hear this line at 00:39:58 in the Blu-ray version of the movie.
Quote context
[...]
- Looks like she can keep Harry on his toes.
- Keep him out of Bedford Falls, anyway.
- Did you know that Mary Hatch is back from school? Came back three days ago.
- Nice girl, Mary. Kind that'll help you find the answers, George.
- Can you give me one good reason why you shouldn't call on Mary?
- Hee-haw? Yes, Sam's crazy about Mary.
- Well, she's not crazy about him
- Well, how do you know? What, did she discuss it with you? No. Well, then how do you know?
[...]