All languages change through common usage. English is no exception. Do you remember any of these once often-used words and expressions?
Heavens to Murgatroyd
Heavens to Betsy
Don’t touch that dial
Hung out to dry (before clothes dryers, I’m guessing)
In like Flynn (again, who’s he?)
Living the life of Riley (another unknown person)
Not for all the tea in China
Spats, knickers, poodle skirts, fedoras, saddle shoes, pedal pushers
Pageboy, beehive and DA hairdos
Kilroy was here
I’ll be a monkey’s uncle
A fine kettle of fish
Knee high to a grasshopper
Don’t take any wooden nickels
And fifty years from now, many of today’s common expressions will be looked at as quaint and archaic.
See ya later, alligator! After a while, crocodile!