One-too-many meaning

Used other than as an idiom: see one,‎ too,‎ many.
noun
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1
(idiomatic) One or more serving too much of alcohol, which leads to drunkenness.

He's had one too many.

noun
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Origin of one-too-many

  • From one drink (of an alcoholic beverage) too many.

    From Wiktionary