Karstedt Share definition Flag It's the last name of Mat, crazy german last name that no one can pronounce but yet everyone seems to like it. If you don't like it, you can go screw yourself. you're so awesome Karstedt! Karstedt by MLK1212 April 21, 2009 0 0 Get merch Get the Karstedt mug. Buy Now — $32.95 See more merch