|2.||fire 'em up|
Going to sleep, being tired or bored
I felt like I was going to fire 'em up in class today.
|1.||fire 'em up|
To sleep. To go to bed. To be extremely bored.
1. I'm tired and I'm ready to go fire 'em up!
2. I was firing 'em up in class because the teacher was so boring!