go blank
US /ɡoʊ blæŋk/
UK /ɡoʊ blæŋk/

1.
devenir vide, avoir un trou de mémoire
to be unable to remember something or think of anything to say
:
•
When the teacher asked me the question, my mind suddenly went blank.
Quand le professeur m'a posé la question, mon esprit est soudainement devenu vide.
•
I tried to remember her name, but I just went blank.
J'ai essayé de me souvenir de son nom, mais je suis juste devenu vide.