3. 1. (idiomatic) One or more serving too much of alcohol, which leads to drunkenness. He's had one too many. noun.

How do you use one too many?

: too many alcoholic drinks He had one too many at the bar last night.

What is the saying one is too many and?

One Is Too Many And A Thousand Not Enough - Overcoming Addiction. - Vertava Health.