Piss ant works just fine , ticks all the boxes in terms of belittling someone to make them feel like a reprobate without being offensive to anyone else . I’d urge him to use that insteadPerhaps the morally outraged can provide a list of politically correct terms for sledging..... but then, bugger me if sledging won't get outlawed by the morally outraged because the sledgee's performance suffered because of the sledge and his feelings were hurt...