1) Australian slang for to vomit 2) Become attentive 3) Become cheerful 4) Come out of a funk 5) Come to life 6) Enliven 7) Gain energy 8) Lose the blues 9) Refresh 10) Show sudden interest 11) Snap out of a funk 
Perk up is slang for to recover health or spirits.
[v] - gain or regain energy