1. Necessary, vital.

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.
I really wish dumbasses hadn't bastardized the definition of the word "crucial" and used it purely to describe something that is actually necessary to the given situation.

"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."
by baybid April 18, 2005
1. Vitally important; essential.

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.
by Thanatos  February 28, 2010
of extreme importance or significance; essential
Sorry dude, that dunk was in no way crucial to anything, as good or as hard as it may have been.

That test was crucial to me passing the grade, but it was hard, so I think I failed.
by W¡ll¡ªM May 28, 2003
An obnoxious slang word 2 or 3 years old?

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.
I say! This dub version of the Misty In Roots classic is murrrrder, crucial, wicked, and rather spendid!
by a jolly good show March 07, 2008
Also used as a noun to describe how important and nesessary something is.
This shit is the crucial!
by sammyp November 29, 2005
A term used to describe any 90s memories of fashion/music/film/tv shows/food
"Do you remember when Top Of The Pops had the old crucial logo?"
by xnasaigorengx October 14, 2011
Refers to an action, event, or object that is far beyond amazing. This word is spreading like wild-fire.
Ah shit bro....that dunk was crucial!
by Mack D & Dor January 24, 2003

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