It is a widely used word meaning to verbally ridicule someone.
I'd never go to 'roast shows' if I was a celeb, first of all I suck at ukugwara and I don't like to be gwara'd. 2, if someone gwaras me too much I end up using hands&fists to solve this problem. Short temper yaka would never allow me to smile till the shpw ends 😂
— Weirdo ❤ (@Barbz_Pearls1) May 14, 2018