roast up

verb3

1. •
   To cook by roasting.

   • For Thanksgiving, I'll roast up a turkey.
2. •
   To roast fully or completely.

   • Then I took another big cast iron pot and put it on the fire. Into this I put some unground cholai and roasted it up good. — 2011
3. •
   (slang) To make fun of; ridicule severely or insultingly.

   • She wouldn't follow instructions so they roasted her up coming off the plane.