to do or say too much because you are so enthusiastic.

I think I went overboard in decorating my house for Christmas.

It's OK to discuss business during dinner, but don't go overboard and hand out documents for your guests to read while they're eating.

Related vocabulary: overdo it

Etymology: based on the literal meaning of go overboard (= to fall over a ship's side)

• save the day
• have one eye on something
• have one foot in the grave
• have on hand
• have on hands
• have on the brain
• have on the run
• have on your hands
• have other fish to fry
• have over a barrel
• have pegged
• have pick of
• have pick of something
• have pins and needles
• have pity on
• have pity on someone
• have pride of place
• have rolling in the aisles
• have second thoughts
• have seen better days
• have seen more something than has had hot dinners
• have seen more something than someone has had hot dinners
• have seen more than has had hot dinners
• have seen more than someone has had hot dinners
• have seen the last of