A/somebody’s second childhood

Pro Tip 1/3

Age-Related Usage

Used to describe elder people showing childlike behavior; not to denote actual childhood.

Since grandpa's health declined, he's been in his second childhood, forgetting names occasionally.

Pro Tip 2/3

Sensitive Context

Use carefully; it could sound disrespectful, as it involves mentioning someone's mental state.

Aunt May is having moments of second childhood, so we need to be patient with her.

Pro Tip 3/3

Not Literal

It's metaphorical; doesn't mean the person actually becomes a child again.

Sometimes, when he forgets where he is, it's like he's in his second childhood.