wild out

verb2

1. •
   To react overly enthusiastically or aggressively, especially if sudden.

   • When she heard the rumor, she just started wilding out!
2. •
   (slang) To stop behaving in a civilized way; to rebel against one's cultural mores.

   • I was just wilding out. But even though I was a rebel kid, I was focused in school. I was an honor student. It was weird. — 2006