This Mackem lad is in the pub, minding his own business, when this big bloke comes up and starts giving him a hard time. "Oi, mate" says the big bloke, "I've shagged your mum" The Mackem just stares at his pint and ignores him A few minutes later the big bloke comes up and taps him on the shoulder "Oi mate" he says, "I've shagged your sister" The Mackem refuses to even look at him Finally the big bloke comes up, grabs him by the shoulders and yells at him: "Last night, I had a threesome with your mum and your sister. You just going to sit there and take that?" The Mackem finally looks up from his pint, sighs, and says: "Go home, Dad. You're drunk."