pump-and-dump
/ˈpʌmpəndˈdʌmp/adjective
- informal denoting the fraudulent practice of encouraging investors to buy shares in a company in order to inflate the price artificially, and then selling one's own shares while the price is high〈非正式〉拉高出货的（为了人为抬高股价而鼓励投资者购买某公司的股票, 然后乘股价在高位时卖出自己手中的股票）。