Also found in: Thesaurus.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.brain-fag - exhaustion that affects mental keennessbrain-fag - exhaustion that affects mental keenness
exhaustion - extreme fatigue
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
And when I turned in my last examination paper I was in full possession of a splendid case of brain-fag. I didn't want to see a book.
Granted my prodigious brain-fag, nevertheless, had I never drunk in the past, the thought would never have entered my mind to get drunk now.