A noun or a verb for any repetitive and boring task that builds xp. See grind.
Origin: When young Conan the Cimmerian's tribe is slaughtered and he is sold into slavery, he is forced to spend a decade walking in a circle pushing the Wheel of Pain. It's tedious and difficult, but at the end he is Arnold Schwarzenegger and more jacked than any human on earth.
A: "Wow, you've lost weight...!"
B: "Yeah, just conanwheeling at the gym these days."