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When I was a kid, my mate's Dad bought a mug on holiday which had a 'W' on it followed by an anchor symbol. He like sailing and nautical paraphernalia and had no idea what it meant. My mate was the only one who clocked it and we laughed about it for ages. Anyways, eventually his sister enquired what he found so funny about the mug and he told her. She relayed this to their dad and he was so aggrieved by the revelation that he put the mug in a bag and smashed it. We still laugh about that to this day.
you can even get mugs with motivational messages on