Manchild

An infant of eight days old shall be circumcised among you, every manchild in your generations: he that is born in the house, as well as the bought servant, shall be circumcised, and whosoever is not of your stock.

Tom is a manchild.

That manchild is threatening another frivolous lawsuit against someone who made fun of him.

John Lewis, Bridget’s fiancé — an appealing, feckless manchild — isn’t so sure.