Definition of brain freeze noun from the Oxford Advanced Learner's Dictionary

     

    brain freeze

     noun
    noun
    BrE BrE//ˈbreɪn friːz//
     
    ; NAmE NAmE//ˈbreɪn friːz//
     
     
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  1. 1[countable, uncountable] a sudden inability to remember a basic fact, name or word, especially when this is embarrassing or in public He suffered a brain freeze on last night’s TV debate. My problem was brain freeze: I knew who she was—I just couldn’t remember her name.
  2. 2[uncountable] a sudden severe headache caused by eating or drinking something very cold too quickly Summer means ice cream, and that means brain freeze—the sudden stabbing pain between the eyes.