An activist who incorporates creativity into his or her schtick without losing credibility or street cred. And even if he or she does lose a little of those two things, the art usually makes up for the loss, rendering the person more soulful and/or funky, or at the very least rejuvinated for more activism-- sort of like what happens with religion, but less complicated, depending on the scope of the artivistic endeavor.
"The Sierra Club could really use some artivists on its payroll, huh?"
"Yeah, bro, their latest campaign was entirely un-artivistic, ineffective, and corporate-friendly."
A political activist who expresses their values through interpretive artistic craft.
Did you see the signs in that protest, I swear some of those activists are pure artivists.