ぶれいこう

無礼講
putting aside rank
free and easy (party)

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ぶれいこう【無礼講】

a free and easy (party); an unceremonious party; an unrestrained revel.

●無礼講にしよう. Let all formality be laid aside. | Let all decorum be thrown aside. | Let us not stand upon ceremony. | Let joy be unconfined. | Let's party.