Shoppers are tradingdown and looking for bargains.
到商店买东西的人都降低消费，寻找减价货。
《牛津词典》
2
They are selling their five-bedroom house and tradingdown to a two-bedroom apartment.
他们正在变卖其五居室的房子，去买一处两居室的公寓。
《柯林斯英汉双解大词典》
3
Such "tradingdown" proved true for much of the latest recession, when fast-food companies picked up customers who could no longer afford to eat at casual restaurants.