German for, literally, “better-knowers”. You have met them – the people who are walking evidence for the truth of the saying that “a little knowledge is a dangerous thing”.
Fritz D. had written a letter, and ordered a translation from Angela E.; when the translation was supplied, Fritz noticed that “danke schön” had been translated as “thank you”. He told Angela that he was not happy about paying, and asked her which word corresponded to “danke” and which word to “schön”; the translation must be mistaken, he told Angela, as there was no “beautiful” to match the “schön”.
Yes, this is apocryphal, but similar things happen in real life.