Phrasal verb Fire up significa empolgar, motivar.
Veja o uso dentro do contexto abaixo: The supporters go to the stadium to fire up their team.
The supporters go to the stadium to get their team fired up.
No nosso bom e velho Português, diriamos por fogo, botar fogo, incendiar...you know what I mean, right?
Now, I gonna leave you with some hot links to get you fired up to study English.
Keep at studing hard, see you!!