One of Poland's major cities is called Łódź, which just means Boat. This is apparently funny enough that "The City of Boat" or "Boat City", verbatim in English, has become a fairly common humorous nickname for it. That, and it's a pretty funny city on its own, since like 40% of it looks as if the Germans just stopped bombing it yesterday, another 40% as if the communist gov never fell, and it all clashes with the remaining presentable 20% magnificently. And often these different "styles" are right next to each other. If you ever have a chance to visit it on the way I highly recommend it, even the attached pictures don't give that extreme contrast justice. Just don't wait too long, they're making progress broadening that 20% and in another 20 years it may look like just another western city.
Another nickname: "uć". It's read similarly to "Łódź" but has only two letters which is pretty impressive. It also sounds kinda funny but that can't be conveyed in text or pictures.