showboat /ˈʃoʊˌboʊt/noun 2verb 1forms 3 noun2 •(US) A river steamboat having a resident theatre.Mr. Sterling was born in Baltimore on June 24, 1915, to Jack Sexton and Edna Cable, veteran performers in vaudeville, showboats and stock companies. — 1990 •(US, informal) A person, often an athlete or performer, who behaves in an ostentatious, flashy manner to attract attention or admiration; a showoff.Well, I was a little upset at first. I mean, obviously people are going to think I'm a showboat, and a little bit of a prick. — 2004 verb1 •(informal) To show off.Out: Trash talk, dirty play, crybabying, showboating and players who can't be bothered to show up for games or keep their shoes on. — 1995 formsshowboated · showboating · showboats