choirboy

Etymology

From choir + boy.

choirboy means A boy chorister. Lexicurio rates it Sui generis — a strength score of 88 out of 100.

noun

A boy chorister.
A piously innocent person.“Kordic is no choirboy. The tribunal has accused him of crimes against humanity for helping to orchestrate a massive campaign of persecution against Muslims in the Lasva valley in central Bosnia.”