Pretty simple really, a combination of the truth of reality and something that is crucial to your well-being. In other words, it is something, you've "gotta have". In all honesty, this word originated on 3 Reinert at Saint Louis University...
2. Misused to express awe, difficulty, or pain, probably arising from some moron that meant "excruciating", but was too much of a semiliterate fucktard to understand the difference. Countless other mentally vacant punks have adopted this misuse of the word, thus advertising their essential stupidity.
It is crucial to understand that copying the mistakes of others only makes you unoriginal as well as idiotic.