Phrase guide

big-boy pants

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

Pull-up underwear worn by a boy during and after toilet training, as contrasted to the diapers worn during infancy.

Definition source: English Wiktionary via Wiktextract

Usage: informal, plural, plural-only

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: underpants

2

noun

Meaning 2

A notional pair of trousers or underwear worn by a male when acting maturely.

Definition source: English Wiktionary via Wiktextract

Usage: figuratively, informal, plural, plural-only

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: big-boy britches

Antonyms: bitchy pants, grumpy pants, scaredy pants

History

Etymology

From big boy.