Real Dictionary

sell off
countable noun: The sell-off of something, for example an industry owned by the state or a company's shares, is the selling of it.
phrasal verb: If you sell something off, you sell it because you need the money.

sell off in British English
a period of heavy selling as on a stock exchange, resulting in a marked decline in prices
to get rid of by selling, esp. at low prices
to sell, esp. at reduced prices, in order to get rid of
noun: a sudden and marked decline in stock or bond prices resulting from widespread selling
noun: the act or an instance of selling something, esp an industry owned by the state, or a company's shares
verb: to sell (remaining or unprofitable items), esp at low prices

sell off in Retail
verb: To sell off things left in stock is to get rid of them, usually by selling them at very low prices.