Idioms and Phrases with have a ball
have a ball
Enjoy oneself enormously, as in It was a great trip—I had a ball. This idiom uses the noun ball in the sense of “a gala dance.” [Slang; 1920s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.