When a musician or band has an over inflated sense of talent. Fan base usually consists of family and friends whom are obligated to support them.
"I'd rather listen to stray cats in heat than one more minute of this crap, these guys have musician delusion."

"No dude, I'm sure that you'll be discovered in this midwestern dive bar, (under his breath as friend walks away) wow he's totally got musician delusion!"
by Ms Keepin real January 17, 2012
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An insult suggesting that someone is not only sub-standard, but that he is incorrect by thinking that he is even up to par. A play on delusions of grandeur.
Clearly not the sharpest tool in the shed, Carl nonetheless suffered from delusions of adequacy.
by ntvnykr October 7, 2006
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The phenomenon in which you catch your reflection in the mirror and get the sense that you're peering into the eyes of a stranger, as if you're looking at a police sketch of your own face aged forward 20 years, which would imply that the real you is out there somewhere, wandering the streets of your old neighborhood, still at large.
When looking into the mirror yesterday, I felt like I had the whipgraft delusion.
by SaikoRyder December 13, 2021
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When you see things as you want them to be, not as they really are.
That fox is really staring at me, she wants me to know that she wants me. Dude you're under an optical delusion, that's a glare not a stare, and if you go over there, she'll slap you blind.
by knowman September 14, 2012
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A diagnosis for when someone uses the wrong word or phrase when speaking but casually continues on as they don't even know they've used it incorrectly or that they've just made a new contribution to the English language. This is usually followed up with the opposite party involved questioning the word/sentence (silently at first to actually appreciate what just took place), but then typically followed up with public ridicule. This is much funnier when its someone in the spotlight. Sarah Palin and George W. Bush are notables who have suffered from this condition.
Sarah Palin on Fox News: "...the President and his wife - you know the First Lady - spoke at NAACP so recently, they have power in their words... They could 'refudiate' what it is this group is saying."
Pundit (silently): "WTF?"
Pundit (silently): "I don't think thats a word, but I better go look that shit up. If I even try to 'refudiate' that without the proper proof, Im going to be the one who gets 'Lynchburged'"
Pundit: "Oh yes, I see your point and totally agree with you (under breath: 'for now...you grammatically delusional bastard')"

George W. Bush: "There's an old saying in Tennessee... I know it's in Texas, probably in Tennessee... that says, fool me once, shame on ...(pauses)... shame on you. Fool me ...(pauses)... You can't get fooled again."
Listener #1: "Doesn't he mean the old proverb: 'Fool me once, shame on you; fool me twice shame on me.' ?"
Listener #2: "Yeah probably, but me must be suffering from a delusion of grammar again."
by Joeybats August 16, 2010
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European fans ability to be completely deluded about how strong their teams are and how relevant their country is. They live in a bubble where they are told how good they are at everything. Then eventually when they get slapped around internationally, they are dumbfounded. This is often pre-empted by or followed by EUxcuses.
A: Hey man, did you see that X team got destroyed in group stages?
B: Yeah, but they were probably the second best team anyways.
A: Wow, that is some EU delusion!
B: No, they only lost because of the weather that day. They aren't used to hot weather. I already said they might lose because of this!
A: Okay, you're just making EUxcuses
by A Dumbass November 13, 2021
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An apt and often used description of the flock of white supremacist true believers who are somehow hooked into the mind boggling belief in the second coming of 45.
As I watched the somewhat fearful journalist interviewing some of the rally’s attendees, I could feel the deeply held seething anger and racially driven entitlement fueling this Cult of Delusion.
by Dr Bunnygirl June 30, 2021
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