I had to google 'uncouth'... (thanks for that one). As you are the one judging people on their language the use of "uncouth" instead of yobo is your decision...
Which brings me back to my query on who gets to decide what is a "swear word". For me it's all about tone and intent. Someone could be friendly and use profanity "whatsupkunts" and wouldn't be considered offensive. Yet someone could aggressively abuse someone without swearing "Oi! I'm sick of hearing all you uncouths being unrefined and lacking grace", and would be offensive in its intent.
