draw a blank

Definitions of draw a blank
  1. verb
    be unable to remember
    “I'm drawing a blank
    synonyms: blank out, block, forget
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    Antonyms:
    call back, call up, recall, recollect, remember, retrieve, think
    recall knowledge from memory; have a recollection
    types:
    slip, slip one's mind
    pass out of one's memory
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