zombying out

Verb

zombie out (third-person singular simple present zombies out, present participle zombieing out, simple past and past participle zombied out)

1. (idiomatic, slang) To become listless, vacant, or unresponsive.
   • Ada Richter has compiled [Piano Classics] with the noble idea of helping younger students work on various aspects of technique without having to zombie out on drills and exercises.1981, Contemporary Keyboard VII:i–vi, page unknown