big-boy pants (English, noun)
expansion: big-boy pants pl (plural only)
Senses:
glosses: Pull-up underwear worn by a boy during and after toilet training, as contrasted to the diapers worn during infancy.
tags: informal
plural
plural-only
glosses: A notional pair of trousers or underwear worn by a male when acting maturely.
tags: figuratively
informal
plural
plural-only
Forms:
form: big boy pants
tags: alternative