to roll around in one's mind
01
to be thought about by someone without much coherence
![to [roll] around in {one's} (mind|head) definition and meaning](https://cdn.langeek.co/photo/45317/original/?type=jpeg "to [roll] around in {one's} (mind|head) definition and meaning")
Collocation
例
Various ideas and possibilities roll around in my mind when I'm brainstorming.
to be thought about by someone without much coherence
Collocation
