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.
2. An obnoxious slang word that surfaced roughly 2 years ago and will not fucking die, along with "phat," "crunk," and Snoop Dogg-esque "izzle" talk. Even more annoying in its condensed form, pronounced "croosh." Usually applied to describe situations or objects in stupid and totally illogical ways.
"YO MAN, I was fucking this phat ass bitch, it was so crucial."
"That's my boy Joe, he's crucial."
"This apple juice is crucial."
"I'm a fucking idiot who uses the word crucial."
Poppycock old bean.
An old time Jamaican usage which has been common in the uk for 30 plus years, my good man.
There is even a strong version of Red Stripe beer called Crucial Brew doncha know?!
It has little to do with the Mainland USA slang like Phat that our esteemed correspondent from accross the pond has related.