Wiktionary
goth up
vb. (context ambitransitive informal humorous English) To dress or decorate in the style of goth subculture.
Usage examples of "goth up".
Then, while Hulik stood looking about the valley, her gun in her hand, he got Goth up on his back and Vezzarn deftly roped her into position there, legs fastened about the captain's waist, arms around his neck.