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cheers; bottoms-up; prosit
toast; drink (in honor or celebration of someone or something)
drinking one's glass dry
「乾杯!」と言ってグラスを掲げた。
I raised my glass and said 'Cheers!'
パーティーが始まる前に乾杯の挨拶があった。
There was a toast before the party started.
みんなで乾杯の音頭を取った。
Everyone led a toast together.