What were the slang from the 1950s?

Answer 1

Oh, but there is so much. Asking this question is like asking about the slang from now and expecting to get a four word answer. And even in the 50s, even without the internet or cable or, really, anything that would provide mass transmission of, really, much of anything other than via the simplest airwaves--still, still language changed as it does now, at a rapid rate. Anyway, one of the best places to find your answer would be:

Among which, under only the letter T, I found:

Tank - A large sedan (usually driven by parents)

That's close - Something wrong or not true

Think Fast - Usually said right before someone threw something at you

Threads - Clothes

Tight - Good friends

Total - To completely destroy, most often in reference to a car

and, of course, there is far more under the other letters. Not only that, but there are more slang sites to explore if you only, you know, do it.