The exact use varied, but the term generally referred to traditionally masculine-looking working-class blokes with big muscles and tattoos who turned tricks for men, usually as a top, and were on the prowl for a wealthy sugar-daddy who would keep them on the payroll. Often a rough-trade lad was quite alpha and dominant, and sometimes he downright humiliated and degraded his trick.
I have a sense the term is no longer widely used, because most men are out, at least to a certain degree, so they no longer have to pretend to be straight whilst quietly patronizing rougher men on the side. But the rough trade look still persists, even if unintentionally, and I would classify this lad as one.
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