Crazyguy
It's much like the word "crazy" but way cooler. It has many meanings. It can be used as both an adjective, verb, or noun.

Crazyguy is a very active word, full of or characterized by activity.

Crazyguy synonyms are: crooked, askew, mad, insane, impractical, erratic, being out of the ordinary, unusual, distracted with desire or excitement, passionate.
You can use crazyguy in both a good and bad way.

Good:
"Wow, you really made that part in the song so AWESOME."
"Yea, I kind of went all crazyguy on it."

Bad:
"Man, Christina Aguilera really butchered the National Anthem at the Super Bowl this year. She just got way too crazyguy on it."

Noun:
"I wouldn't walk by yourself around here. There's way too many crazyguys in the area."