It means the sam in German, a ghost the makes noise. You rarly need it in conversation, so I would suggest 'Bitte' as a more useful first word to learn.
Not correct, but unfortunately I would have to go all grammar-nazi to explain the differense. long and tedious.
Germans do have insulting words. Sweinhund, ... - Just not as many as Americans have. And Americans do have insulting gestures. 'the finger', ... - Just not as many as Gernans have. And German does not have an 'i' before 'e' ecept after 'c' rule :) it is 'nein', not 'nien'