1. noun, slang One who does something extreme or intense, often shocking or inspiring admiration in the speaker. That kid's a savage—did you see his back flip off the slide? Stay away from that guy, he's a total savage—he beat up my little brother!

2. adjective, slang Extreme or intense, often in a way that shocks or inspires admiration in the speaker. Did you see that kid's savage back flip off the slide? Stay away from that guy, he's totally savage—he beat up my little brother!