Wiktionary
have a ball
vb. (context idiomatic English) To enjoy thoroughly; to have lots of fun or excitement.
WordNet
have a ball
v. enjoy oneself greatly; "We had a ball at the party and didn't come home until 2 AM" [syn: have a good time]
Wikipedia
Have a Ball
Have a Ball is the first album by Me First and the Gimme Gimmes, released in 1997 on the Fat Wreck Chords independent record label. The album is made up entirely of "Hits of the '60s and '70s", with the exception of Billy Joel's " Uptown Girl", originally released in 1983.
Usage examples of "have a ball".
I remember one day we 'd been playing have a ball, and were all rigged up, even the boys.
Well, anyhow, I could lodge in a lovely half-timbered inn, and go to the Globe Theatre, and generally have a ball.