не валяй дурака

don't play dumb

→ не
phrase Rare #34,272
don't play dumb An informal expression used to tell someone to stop pretending not to understand or to stop fooling around. The plural or polite form is «не валяйте дурака».
RU: Не валяй дурака, ты прекрасно знаешь ответ.
EN: Don't play dumb; you know the answer perfectly well.

Не валяй дурака!

Don't play the fool!

— Дьяволицы (1955)

Не валяй дурака.

Don't play the fool.

— Идеальные незнакомцы (2016)

Миш, не валяй дурака.

Mish, quit messing around.

— Radio Day (2008)

Не валяй дурака, Джо!

Don't be a fool, Joe!

— Плата за страх (1953)