: a large boat that has a theater and a group of performers and that gives plays at towns and cities along a river
: a person (such as an athlete) who behaves or performs in a way that is meant to attract the attention of a lot of people
: to behave or perform in a way that is meant to attract the attention of a lot of people
What made you want to look up showboat? Please tell us where you read or heard it (including the quote, if possible).