noun
three penalty cups of sake for latecomers
A traditional drinking custom where a person arriving late to a party must drink three cups of sake as a penalty. Often used humorously or as a set phrase.
遅刻したら駆け付け三杯だよ。
If you're late, you have to drink three penalty cups of sake.
宴会では駆け付け三杯の習慣
At banquets, the custom of three penalty cups for latecomers still remains.