One thing I’ve learned while researching for a story set during WW II - there’s a lot of slang from back in the day probably better off lost to history.
Some of my favorites:
Tooting the wrong ringer (Asking the wrong person)
Hi sugar, are you rationed? (Hey girl, you got a man?)
Motorized freckles (Insects - I know, wtf?)
Hen fruit (Eggs. Nasty…)