freak out freak out /frik aʊt/

noun

1. [Informal] A wild delusion (especially one induced by a hallucinogenic drug)  ( disorientation , freak out [Informal] , freak-out [Informal] )
   a wild delusion (especially one induced by a hallucinogenic drug)
   

verb

1. [Informal] Lose one's nerve  ( freak , freak out [Informal] , gross out [Informal] )
   lose one's nerve
    When he saw the accident, he freaked out
   When he saw the accident, he freaked out