fire up

Verb

fire up (third-person singular simple present fires up, present participle firing up, simple past and past participle fired up)

1. (transitive) To ignite.
   • Let's fire up the grill and have a barbecue.
   • They're[renewables] not strong enough to fire up the plants that you need to make your country great. The wind doesn't blow. Those big windmills are so pathetic and so bad, so expensive to operate, and they have to be rebuilt all the time and they start to rust and rot.2025 September 23, Donald Trump, speech at United Nations

   Synonyms:

   inflame, kindle, aflame, alight, conflagrate, fire, ignite, enkindle, light, light up

2. (intransitive) Of an engine or similar, to start.
   • The generator fired up shortly after the power failure began.

   Synonyms:

   fire, start up

3. (informal, transitive) To launch; to run.
   • Fire up a text editor.
   • Fire up your computer.

   Synonyms:

   activate, start up

4. (transitive) To excite; to infuse with energy.
   • The band went out to fire up the crowd before the game.

   Synonyms:

   ginger up, spice up, animate, arouse, awaken, beghast, leaven, bright, brighten, cheer

5. (dated, intransitive) To grow irritated or angry.
   • He […] fired up, and stood vigorously on his defence.1911, Thomas Babington Macaulay, “Bunyan, John”, in 1911 Encyclopædia Britannica

   Synonyms:

   anger