brain storm

Meanings

1. A seizure, convulsion, or similar incident of abnormal brain activity.
2. Alternative form of brainstorm (“a sudden thought which solves a problem; a brainstorming session”).

1. Alternative form of brainstorm (“solve a problem with brainstorming”).

Etymology

From brain + storm. In the sense of "seizure, convulsion, brain activity", from the idea that it is like a storm in the brain. In the sense of "problem-solving idea or session", from the unrelated idea of using the "brain to storm a problem" (see brainstorm).