have kittens

English

have kittens (third-person singular simple present has kittens, present participle having kittens, simple past and past participle had kittens)

(informal) To become extremely upset.
Your mum will have kittens when she sees what you've done to your hair!

My teacher has kittens every time I get a question wrong.
- 1960, P. G. Wodehouse, Jeeves in the Offing, chapter VII:
  He re-gurgled. “But this is terrible.” “Might be considerably better, I agree.” “Your uncle will be most upset.” “He'll have kittens.”
- 2010, Jennifer Egan, “Safari”, in A Visit from the Goon Squad:
  ‘Prepare yourself,’ he warned. ‘Your dad is having kittens.’
(informal) To be in a state of frantic nervousness.
The guests are starting to arrive, but the hostess is having kittens because nothing is ready yet.
(literal) Usually of a female cat, to give birth to kittens.

to become extremely upset