Debates in the pub after a long day and a few glasses of house red can get heated. Whether it's over the latest episode of Keeping Up With The Kardashians or a simple mention of the word "Trump," expletives will inevitably slip out.But be prepared to hold your tongue next time you go for a pint. If you drop the F bomb in certain pubs in the UK, you could now risk being barred.Under new behaviour guidelines issued last week by pub group Samuel Smith's Brewery, staff are instructed to refuse service to sweary customers. According to Sam Smith pub managers, the new zero-tolerance policy against profane language could also see customers banned from the premises.Local news website GazetteLive reports that several of the country's 200 Sam Smith pubs have even put up signs informing to inform customers of the new anti-swear policy. The notice reads: "We wish to inform all of our customers that we have introduced a zero tolerance policy against swearing in all of our pubs. Please kindly respect this policy."Read more on MUNCHIES.