grandstand play, make a

grandstand play, make a

Show off, act ostentatiously, as in His colleagues were annoyed with Tom for constantly making a grandstand play at sales conferences . This expression was first used for a baseball play made to impress the crowd in the grandstand (the section of high-priced seats at ballparks). [Second half of 1800s] For a synonym, see play to the gallery.
See also: grandstand, make