看美剧学英语习语：Buy in bulk

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Buy in bulk：to purchase large quantities of a particular product or products. A supplier may offer a price discount to encourage the placement of large orders as a means of obtaining extra sales.

In many cases, however, the initiative lies with buyers, with powerful retailing and wholesaling groups exacting favourable price concessions from suppliers by playing one supplier off against another.

中文释义：这个短语在超市或促销门店较为常见，意思是成批或大宗购买某种物品或套装，一般是为了省钱而大量贮备和囤货；商家为了促销，会选择一个介于批发和零售价之间的价格鼓励消费者“Buy in bulk”。有时候资金雄厚的商家为了打击对手，甚至不惜成本玩bulk buying，以挤兑实力较弱的一方，逼迫其知难而退。