A guy is sitting at a bar, and a drunk dude walks up to him, calling his mom a whore. The first guy just ignores it and stays in his spot drinking his beer.
An hour goes by and the drunk dude comes back saying, "Your mom is a whore!" The first guy looks around the bar, sees people staring and says, "Don't worry, everything is cool here," and shrugs it off.
After a few more shots, the drunk dude walks up a third time and says, "Your mom... is such... a whore!" The guy finally gets mad, throws his fist on the table and says, "You know what, Dad? Go home!"