(Pronounced, 'Kell boo-majh')
Definition: Major bummer. Total drag. Accept the inevitable.
He: Dude, I tried my best to get tickets to Tool but they were, like, totally sold out...
She: Quell bummage!
He: Totally, dude, yeah, like, what a fu**kin' bummer, man...
Cali cop talk in regards to a person who is suicidal and/or a danger to themselves and possibly others; someone who is suffering what is called a "psychotic break."
You: Chillax, now, don't go all 5150 on me!
Me: Clearly you are too inarticulate and stupid to be even remotely imaginative enough to gamble your ass up to the elitist club of the 5150!