off a boat or ship and into the water Englisch:

He's given to going overboard every time he gets a new idea.

Two sailors were swept overboard by the wave.

Man overboard

On occasion, in the early days, he dipped his head overboard, sniffed the sea and took a few sips, but quickly he stopped doing it.

Someone had fallen overboard.

throw it overboard

John sometime goes overboard in drinking.

I went overboard about the Beatles when I was young.

He fell overboard and was drowned.

He went overboard for his daughter's wedding.