in short trousers

English

Etymology

From an early 20th century practice of reserving short pants only for small children.

Prepositional phrase

in short trousers

  1. (idiomatic) In childhood; as a child; when quite young (including nonliterally, e.g., as a young adult).
    Synonym: in short pants (especially North America)
    Near-synonym: in diapers
    We didn't have computers or mobile phones back when I was in short trousers!