The MTG Urban Dictionary - Savage (adj., n.)
Savage (adj.)
1. Crazy, awesome, cool, insane, unbelievable.
Ed: I just picked up a couple of Tarmogoyfs for $100 each.
Stacy: That's savage!
Savage (n.)
1. A ridiculous person.
Rick: Tim won his win-and-in to the top 8. He topdecked 3 Siege Rhinos in a row.
Erica: What a savage!
Additional Reading
1. Financial Quick Picks - MTG Hit List, Get in before Pro Tour Oath of the Gatewatch [Edward Eng]
2. The MTG Community - 2015 Yearly Review [Edward Eng]