Английский словарь американских идиом - popup

{v.} 1. or bob up To appear suddenly or unexpectedly; show up; come out. * /Just when the coach thought he had everything under control, a new problem bobbed up./ * /After no one had heard from him for years, John popped up in town again./ 2. To hit a pop fly in baseball. * /Jim popped the pitch up./