Have A Ball Meaning

(idiomatic) To enjoy thoroughly; to have lots of fun or excitement.

Example:   The kids had a ball playing in the fountain.
1973, Slade - Merry Xmas Everybody
  Are you hanging up a stocking on your wall?
  It's the time that every Santa has a ball
  Does he ride a red-nosed reindeer?
  Does a ton up on his sleigh
  Do the fairies keep him sober for a day?
1976, ABBA - Money
  In my dreams I have a plan
  If I got me a wealthy man
  I wouldn't have to work at all, I'd fool around and have a ball
1998, Baha Men - Who Let the Dogs Out?
  When the party was nice, the party was jumpin' (Hey, Yippie, Yi, Yo)
  And everybody havin' a ball' (Hah, ho, Yippie Yi Yo)'
2011, Rebecca Black featuring Patrice Wilson, Friday
  Yesterday was Thursday, Thursday
  Today i-is Friday, Friday
  We-we-we so excited
  We so excited
  We gonna have a ball today.