Ah I see This sort of quandry demands an example Example you have met a young lady with whom you have developed feelings SADLY when your friends meet her a sly grin crosses the face of your best mate Over a few thousand beers he lets slip that s a slag OR she is a slag or MORTAL INSULT I have banged that slag your lady friend THEN in true drunken manner you reply SHUT YOUR GOB or I will stick my fist in it and shut it for you ERGO at this point the rules of drunken disorderly behavior demand that you either A Apologize in a profuse manner or B Knee your mate in the balls and begin to beat him like a rented pack mule