Rabid describes something extreme, intense, or wildly out of control. When people call sports fans rabid, they mean those fans are so passionate and enthusiastic that they never miss a game, paint their faces in team colors, and argue fiercely about every play. A rabid collector might search garage sales every weekend hunting for rare baseball cards or vintage toys, driven by an intense obsession.

An animal with rabies becomes confused, aggressive, and behaves strangely, sometimes attacking without warning. When you call someone's enthusiasm rabid, you're suggesting their feelings are so strong they've lost perspective or balance.

You might encounter rabid fans of a book series who defend every detail as perfect, or a rabid opponent of a school rule who can't discuss it calmly. The word carries a warning: this intensity has crossed into something excessive or even dangerous. Unlike simple passion or dedication, rabid suggests someone whose strong feelings have overwhelmed their good judgment.