Normally, during Scrabble competitive events, any word is allowed to be played as long as it's in the approved dictionary. I'm sure you can think of a pile of words that would offend people but also appear in dictionaries.
However, this rule is amended for television. Well, apparently one guy forgot that and played "Les," as in, short for lesbian. The judges didn't notice it at first, so the play proceeded. The next turn someone noticed, and they stopped play to decided that the word should not have been allowed. They forced the gentleman to return his three new pieces, take back the word, and to replay as though it had never happened.
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