big-girl pants
big-girl pants · big-girl pantses
Pull-up underwear worn by a girl during and after toilet training, as contrasted to…Pull-up underwear worn by a girl during and after toilet training, as contrasted to the diapers worn during infancy.
Meaning
2 senses(informal, plural, plural only)Pull-up underwear worn by a girl during and after toilet training, as contrasted to the diapers worn during infancy.
(figuratively, informal, plural, plural only)A notional pair of trousers or underwear worn by a female when acting maturely.
Origin
See big girl.See big girl.
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