To gallivant means to wander around seeking pleasure and entertainment, often when you probably should be doing something more responsible. When your dad says you've been gallivanting around town all afternoon instead of finishing your homework, he means you've been roaming from place to place having fun without much purpose.

The word carries a playful tone of mild disapproval. It suggests someone is being a bit carefree or irresponsible, but not in a truly harmful way. A character in a story might gallivant across Europe instead of settling down to work, or kids might gallivant through the neighborhood on their bikes when they're supposed to be doing chores.

Gallivanting means moving around in a lighthearted, somewhat aimless way, enjoying yourself as you go. You wouldn't say someone gallivanted to the dentist or gallivanted to do grocery shopping. The word fits better when someone's off on an adventure, exploring for the fun of it, maybe staying out longer than expected or visiting more places than planned.