This is the one of the only way Germans can expand after the 1919 Treaty of Versailles. For more information on the other form of land expansion, google German expansion 69
It translates to "son of a whore" and is one of the more severe general insults in the german language. r/ich_iel, the german version of me_irl overused this word badly after it became a meme to answer with "Sprich deutsch, du Huhrensohn" (speak german you son of a whore) to people using english words in the sub.