Usually refers to an informal brainstorming process among friends or colleagues. We kicked around some names for our new puppy.
Pro Tip 2/3
No commitment
The phrase implies a lack of firm plans or commitment to the ideas being discussed. They kicked around the possibility of traveling together, but nothing is set in stone.
Pro Tip 3/3
Casual conversation
Used for casual conversations, not for formal or serious discussions. At lunch, we often kick around different topics just for fun.