brain fag

/breɪn fæɡ/
noun
  1. Mental exhaustion or fatigue caused by overwork or prolonged mental effort.
    • After studying for twelve hours straight, she was suffering from severe brain-fag.
    • The constant problem-solving at work left him with a case of brain-fag by Friday afternoon.
    • He took a short walk to relieve his brain-fag before continuing to write his essay.
Antonyms
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