Meaning of go by the board | Babel Free

Definitions

1. To fall or to go overboard; to be cast over the side of a ship.
   idiomatic
2. To be superseded, rejected, or obliterated; to pass by with little consequence; to amount to nothing.
   idiomatic

Examples

“How many cups of tea I drank, because Dora made it, I don’t know. But, I perfectly remember that I sat swilling tea until my whole nervous system, if I had had any in those days, must have gone by the board.”

CEFR level