başı qaçmaq

Azerbaijani

Etymology

Literally, one's head to escape.

Verb

başı qaçmaq (idiomatic)

  1. to lose one's mind, to go crazy
    O nə söz idi, deyirsən, başın qaçıb?
    What are you saying, have you lost your mind?
    (literally, “What was that word you were saying, did your head escape?”)