Rip sb off:意思是商店或者商贩企图宰他的顾客.如真的被宰,可以说'I was ripped off.'或者'I was cleaned out.'
'讨价还价'的场所一般只在market(市场),而shopping mall, supermarket, department store这样的地方,一般物品是不打折的.
Bulik purchaese:大量购买.等于buy sth in bulk.
Discount:折扣
Coupon:商家的优惠券
On sale:原指某种商品的出售或上市.但在美国on sale则用来指降价出售某种商品.平时在商店里常出现的表示打折的牌子就是on sale,专门卖廉价物品的商店就是bargain store,店里买廉价商品的柜台叫bargain counter.
Warehouse:仓库,货栈,大商店
Flea market:跳蚤市场