(colloquial) Very emotional or excited, positively or negatively, regarding something.

simple past tense and past participle of fire up

(transitive) To ignite. / (intransitive) Of an engine or similar, to start. / (transitive, computing, informal) To launch; to run. / (transitive) To excite; to infuse with energy.

Third-person singular simple present indicative form of fire up

present participle of fire up