In Great Expectations, how does Trabb's boy treat Pip?

Trabb's boy treats Pip with baiting disrespect.

He wore the blue bag in the manner of my great-coat, and was strutting along the pavement towards me on the opposite side of the street, attended by a company of delighted young friends to whom he from time to time exclaimed, with a wave of his hand, “Don’t know yah!” Words cannot state the amount of aggravation and injury wreaked upon me by Trabb’s boy, when passing abreast of me, he pulled up his shirt-collar, twined his side-hair, stuck an arm akimbo, and smirked extravagantly by, wriggling his elbows and body, and drawling to his attendants, “Don’t know yah, don’t know yah, ’pon my soul don’t know yah!” The disgrace attendant on his immediately afterwards taking to crowing and pursuing me across the bridge with crows, as from an exceedingly dejected fowl who had known me when I was a blacksmith, culminated the disgrace with which I left the town, and was, so to speak, ejected by it into the open country.