The idiom "have one too many" means to drink too much alcohol. It is often used when someone has had too much to drink and is starting to act or speak in a way that is not normal for them.
For example, if someone is at a party and they have been drinking all night, and then they start slurring their words or stumbling around, someone might say "Looks like he's had one too many."
This idiom can also be used in a more serious context, such as when someone is driving under the influence of alcohol. In this case, it means that the person has consumed more alcohol than they can handle, and they are no longer able to drive safely.
Overall, "have one too many" is a common slang expression used to describe someone who has consumed too much alcohol and is no longer in control of their actions or behavior.
• After a long day at work, I decided to have one too many glasses of wine and ended up sleeping through my alarm the next morning.
• The CEO's erratic behavior at the board meeting suggested that he may have had one too many before arriving.
• John had one too many at the party last night and ended up falling asleep on the couch.
• I'm sorry, I can't drive you home. I had one too many drinks.
• I think I had one too many pieces of cake at the party. My stomach is feeling uneasy.
• The politician seemed to have had one too many during the press conference, as he could barely string a coherent sentence together.