A word that is not meant to be uttered. If you dare utter this word, severe consequences will subsequently occur. Do not bother try to run or hide once you utter the word, you are merely delaying the inevitable.
Man 1: Th Thuggy
Man 2: OH NO DUDE! YOU JUST SAID THE WORD THAT IS NOT MEANT TO BE UTTERED!
Man 1: Huh? *dies brutally*