landslide victory 压倒性胜利；一边倒的胜利；巨大的胜利

【例句】
The National League for Democracy pulled off a landslide victory.
全国民主联盟获得了压倒性的胜利。

His popularity has fallen dramatically since he won a landslide victory last year.
自从去年取得压倒性胜利以来，他的支持率急剧下降。