German for "NO". Usually used when one is frustrated to such a great extent that a normal english cuss word won't do. To be used sparingly and with vigor and strength.
Example: "Hey dude! I can't make it tonight- my girlfriend really wants to see me."
NEIN is a word that acts as every known cuss. (Also translates to "NO" or "NEVER" in German)
Usually said whilst yelling or with vigour. Not to be confused with "Nine" or "Nien" (Nien is for dumbasses)