The Prophet (ﷺ) Is a Fat Dwarf
Abdus-Salam ibn Abu Hazim said: "I saw Abu Barzah who came to visit Ubaydullah ibn Ziyad. Then a man named Muslim who was there in the company mentioned it to me. When Ubaydullah saw him, he said: "This Muhammad of yours is a fat dwarf." The old man (i.e., Abu Barzah) understood it. So he said: "I don't think that I should remain among people who criticize me for having had the company of Muhammad (ﷺ)." Thereupon Ubaydullah said to him: "The company of Muhammad (ﷺ) is a honour for you, not a disgrace." He added: "I called for you to ask about the Haud (reservoir or cistern). Did you hear the Messenger of Allah (ﷺ) say anything about it?" Abu Barzah said: "Yes, not once, twice, thrice, four times or five times. Whoever disbelieves in it, may Allah not supply him with water from it." He then went away angrily."
Abu Dawud 4749
Some allege that this Hadith says that the "Muhammad" referred to as a fat dwarf in the Hadith is Prophet Muhammad, and the fact that the old man Abu Barzah "understood it" implies that Ubaydullah's description of Prophet Muhammad as a fat dwarf was accurate. However, there's a complete mistranslation here; Ubaydullah's reference never included the Prophet in his mockery, let alone the Prophet being present in that place. He only called Abu Barzah, the companion of the Prophet, a "Muhammadan" in an insulting tone; he used the word Muhammadīkum (محمّديكم), meaning "this Muhammadan of yours," and not Muhammadukum (محمّدكم), meaning "this Muhammad of yours," which clearly shows that he was referring to Abu Barzah as a Muhammadan, and this is because he was a companion of the Prophet. The correct translation would be: "This Muhammadan of yours is a fat dwarf."
Ubaydullah mocked Abu Barzah by calling him a fat dwarf, and he understood it by replying that he is being mocked for being a companion (i.e., Muhammadan). If you're being skeptical about the mistranslation, then check out Sunnah.com's accurate translation:
When Ubaydullah saw him, he said: "This Muhammadan (i.e., companion of Muhammad (ﷺ)) of yours is short and fat." The old man (i.e., Abu Barzah) understood it.
Abu Dawud 4749
Even if we assume that the mockery was against the Prophet, how does that mean that it was "accurate"? Ubaydullah has never saw the Prophet, while the entirety of the companions who met him described him otherwise. From here we clearly see that this is a total blunder coupled with deliberate trickery by taking advantage of the mistranslation.