Simplify the following text for a Grade 8 native English-speaking person.
Original: The term `` patent troll '' was used as early as 1993 to describe companies that file aggressive patent lawsuits .
Simplified: A patent troll is an unkind phrase used to describe a company or person that owns a patent and tries to get other people to pay a lot of money for the right to use the patent . The patent troll usually asks for an amount of money that is less than defending a lawsuit .