All right - Arsenic and Old Lace - I had forgotten because - 1. It's old and/or 2. I'm old and senile. Peter Lorre found immortality with the one line "Oh, no Johnny, not the Melbourne method".
Another old one is "Miracle at Morgan's Creek" from 1944 with a very pregnant and single heroine named Trudy Kockenlocker. Don't know how that one got by.
Thanks for the mental nudge, Kid.
We deal in lead, friend.