Adding unnecessary style flurishes to skilled activities, often beyond onesskill level, increasing the risk, and usually used to taunt or impress others.
That skateboarder was showboating to impress that girl when he broke his ankle.
The Washington Generals were down 150 to 10 but the Globetrotters were still showboating for the crowd.
A man or woman that takes joy In fucking in public places, usually in plain site. You'll most often see the Memphis Showboat in public parks, Jack Pirtle's Chicken parking lots, or Picadilley Cafeteria buffet lines.
Look at those Memphis Showboats over there fucking on top of that statue of Robert E. Lee.