Meaning

2 senses
  1. (attributive, countable, informal, sometimes)Synonym of grump (“person who is currently in a bad mood or is habitually cranky”).

    Near-synonym: bitchy-pants

  2. (informal, uncountable)A notional pair of pants worn by someone in a bad mood.

    Near-synonym: bitchy pants

    We asked him to take off his grumpy pants and put on his big-boy pants.

Origin

From grumpy + -pants.

From grumpy + -pants.

Wiktionary, CC BY-SA 4.0 · source

grumpy pants — meaning, examples, forms, synonyms | Krumeto