młodzieńcza głupota

Rock was a lark, a youthful folly; of course, the fun would run out sooner or later.

That would remind me of my youthful follies as well as how not to manage a Hold.

One endured with humbled dignity the consequences of youthful folly.

"It cannot be affected by any youthful folly of a lieutenant," said the colonel, severely.

What did an older Cage think of his youthful follies?

Some say it's just youthful folly, but I feel more adult than them.

He is rash and quick-tempered, but are those youthful follies alone?

"Oh, time for you to get in on youthful follies, so have something to repent later!"

He would be embarrassed to admit his youthful folly to you.

These views were not youthful follies, left behind long before Tate joined the board.