bargain basement
noun [ C usually singular ] uk/ˌbɑː.ɡɪn ˈbeɪs.mənt/ us/ˌbɑːr.ɡɪn ˈbeɪs.mənt/
（商场的地下）减价商品区
an underground room in a shop where things are sold at reduced prices
[ before noun ] Jonathan manages to buy all his clothes at bargain-basement prices (= very cheaply). 乔纳森所有的衣服都买得很便宜。