A Crown Jewel Option is a defensive strategy used by companies to prevent hostile takeovers by giving a partner or friendly company the right to buy some of its best assets at a favorable price if a takeover were successful.
A killer bee is an investment banker who devises strategies to assist businesses in resisting predatory takeover bids by making the target company appear less attractive.
A poison pill is a defensive strategy employed by a target company to thwart hostile takeover attempts by making the company's stock less attractive to the acquirer.
Shark repellent is a measure undertaken by a corporation to discourage unwanted takeover attempts by making the company less attractive to the potential acquirer.
