1. A river steamboat on which theatrical performances could be given (especially on the Mississippi River)
   "Tourists enjoyed a nostalgic evening of entertainment on the restored showboat"
    
2. [N. Amer, informal] Someone who deliberately behaves in such a way as to attract attention
   "The showboat performed a series of unnecessary stunts on his skateboard";
   - exhibitionist, show-off [informal]

1. Display proudly; act ostentatiously or pretentiously
   "he showboated his new sports car";
   - flaunt, flash [informal], show off, ostentate [archaic], swank [informal], flex [N. Amer, informal], parade

Derived forms: showboats, showboating, showboated

Type of: display, egoist, egotist, exhibit, expose, river boat, steamboat, swellhead [N. Amer, informal]

Encyclopedia: Showboat