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A sombrero-style hat made entirely of a hard corn tortilla, which has a bowl in the top that can be filled with nacho cheese. The hat itself can be broken off in chunks, dipped into its own cheese bowl, and completely eaten.

Though made famous when worn by Homer Simpson on an episode of The Simpsons, it does not seem to exist in real life.
Homer ate the entire nacho hat that Ned Flanders bought for him at the football game.
by MooseBoy18 July 10, 2008
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2
A hat formed out of some sort of friend corn product into a sombrero shape and the crown shaped like a bowl, filled with melted nacho cheese. Pieces of the hat are broken off, dipped in it's own cheese and consumed until hat and cheese is completely gone.
In “Homer Loves Flanders” (1F14), Homer becomes attached to his neighbor Ned Flanders, whom he normally hates, after Ned brings him to a local football game and buys him a "nacho hat" --a giant nacho shaped like a sombrero and filled with some sort of dipping sauce at the top.
by Hyperbaria December 20, 2005
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3
1. A dish set used for eating nachos. Usually resembling a mexican hat as the main dish and a bowl in the center for salsa/dip.
Susan put the chips for the party in a nacho hat.
by Nachoridnary July 12, 2005
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4
1. The act of deficating and uirnating on somebodys head, followed by scooping the excretions with ones penis and forcibly inserting the peinis into the other persons mouth. 2. A hat which is not your own.
Man Bill, I gave my wife a nacho hat last night and golly gee was it swell.
I beat that cracker down and gave him a nacho hat.

Hey man, thats <b>nacho hat!</b>
by Dr. Alex Pieron. May 07, 2005
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