sweeping the board

Verb

sweep the board (third-person singular simple present sweeps the board, present participle sweeping the board, simple past and past participle swept the board)

1. (idiomatic) To win all the prizes in a competition.
   • Spadillio first, unconquerable Lord!
     Led off two captive Trumps, and swept the Board.
     As many more Manillio forc'd to yield,
     And march'd a Victor from the verdant Field.1714, Alexander Pope, “Canto III”, in The Rape of the Lock (poetry)
2. To take all of the cards.
3. (idiomatic) To get enough votes in an election to gain all the seats.