Where the word 'murdacious' comes from

One day in Calculus with a kid named Door, we were talking about random things and Door was pissing me off somehow (in a jokingly way), and so I tried to express my 'hateful' feelings, but could not think of a word that meant I wanted to kill him. Then the word 'murdacious' came out. Then the next day I decided to make a website with my new word.