A "poison pill" is a business strategy used to deter hostile takeovers. It generally involves implementing measures that make it less attractive for a company to acquire another by increasing the cost or risk of the transaction. Some common synonyms for "poison pill" include anti-takeover defense, shark repellent, golden parachute, and crown jewel defense. An anti-takeover defense may involve implementing measures like staggered board terms, which make it harder for a hostile acquirer to gain control of the board of directors. Shark repellent is a term used to describe actions taken to ward off hostile takeover attempts, while golden parachute describes a strategy of offering key executives a lucrative severance package to discourage the acquirer from targeting the company. Finally, a crown jewel defense generally involves selling off the most valuable parts of a company to make it less desirable to a hostile acquirer.