I. ˈshō-ˌbōt noun
Date: 1869
1. : a river steamship containing a theater and carrying a troupe of actors to give plays at river communities
2. : one who tries to attract attention by conspicuous behavior
II. intransitive verb
Date: 1951
: to behave in a conspicuous or ostentatious manner : show off
• show·boat·er noun