An overwhelming or crushing victory — winning by a large margin (often used for games, elections, competitions).
チームは二試合連続で圧勝した。
The team won by a landslide in two consecutive matches.
選挙であの候補者が圧勝を収めた。
That candidate achieved a landslide victory in the election.
今大会は新人の圧勝だった。
This tournament was dominated by the rookie.