This was a joke on Eli's Dirty Jokes on youtube. It was alright, but he told it better, and even then, still not the funniest joke ever. Pretty funny though.
Two ferrets in a bar having a good drinking session. Pint after pint after pint they share banter until one ferret turns to the other and says "Ive shag*ed your Ma" and the other ferret replies "Okay dad time to go home I think"