To blank out is to find your mind suddenly empty. Blank out in the exam, blank out completely.
It happens most under pressure, since stress interferes directly with recall. To blank out is not forgetting, because the thing comes back as soon as the pressure is off.
1phraseblank outTo find your mind suddenly empty.
“She would blank out the moment anybody watched her write.”
blank out is a phrase.
Practised in Thinking & Memory