What were popular sayings in the 1940's?

"It don't mean a thing if it ain't got that swing"

"You're a sap, Mr. Jap"

"Kilroy was here"

"Uncle Sam needs you".

"For the boys"

"Be like Dad, keep Mum"

"Use it up, wear it out, make it do, or do without"

"We can do IT!"

"loose lips sink ships"

"God is on our side", etc, etc, etc.