What does "knockabout" mean?

Additional senses

1. 2.Characterized by, or suitable for, knocking about, or traveling or wandering hither and thither.
2. 3.That does odd jobs; -- said of a class of hands or laborers on a sheep station. [Collog., Australia]
3. 4.(Naut.) A small yacht, generally from fifteen to twenty-five feet in length, having a mainsail and a jib. All knockabouts have ballast and either a keel or centerboard. The original type was twenty-one feet in length. The next larger type is called a raceabout.
4. 5.A knockabout performer or performance. [Theat. Slang]
5. 6.A man hired on a sheep station to do odd jobs. [Colloq., Australia]