I'm a dinosaur I guess. I still use some of these old slang words.Not every day, but fairly often. Here's a few.
Shut your pie hole, or shut your soup cooler Shut your mouth
A babe A woman
Behind the eight ball In a difficult position
A "C" note A hundred dollar bill
A "Fin" A five dollar bill
A roscoe A gun
There's a few more, but these were the first ones I could think of.
Anybody else? Or is it just me?