1) A light cuss word in Germany. It directly translates to "
shit", but in southern Germany kids
will say it and not get in trouble. It really only means "crap".
2) An americanised way of spelling "sheiße", since the double s is hard to understand for most non-Germans and is hard to type on an american english keyboard.
3) A Lady Gaga song. Very surprising because she isn't
German and she literally doesn't know a living fuck about pronunciation.