This game will be the quarterback's swan song-he's retiring after this season.
(swan song means a final appearance)
I was sick as a parrot after Man United lost last night.
(sick as a parrot means very disappointed)
（sick as a parrot指失望透顶的）
I almost didn't go on stage and perform tonight because I had butterflies in my stomach.
(had butterflies in my stomach means be nervous)
（had butterflies in my stomach指心里七上八下的）
I think this is a wild goose chase. This library doesn't have the books we need.
(a wild goose chase is an impossible task)
（a wild goose chase指白费力气）
Glen is a lone wolf and seldom joins in the activities of the neighborhood.
(a lone wolf is someone who is not social)
（a lone wolf指独来独往的人）