Verb
build a better mousetrap (third-person singular simple present builds a better mousetrap, present participle building a better mousetrap, simple past and past participle built a better mousetrap)
(idiomatic) To invent the next great thing; to have a better idea.
Build a better mousetrap, and the world will beat a path to your door. misattributed to Ralph Waldo Emerson
Of all the inventors to obtain patents, only a few have really built a better mousetrap.