blank out

Definitions

To experience a temporary failure of memory or consciousness.

To intentionally ignore or exclude someone or something from one's thoughts.

Examples

I completely blanked out during the exam and couldn't remember a single answer.

Sometimes I just blank out when I'm tired and forget what I was about to say.

Synonyms

forget black out draw a blank lapse blank lose memory

Antonyms

remember recall recollect retain mind think of