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1.
A mispronunciation of "under-appreciated" from the movie Bedtime Stories.

Also, an amalgam of under-appreciated, demeaned, and emaciated, meaning to under-appreciate one who is emaciated and to demean them for being so.
"I felt so under-demeciated when they laughed at me for feeling bloated after eating three french fries and a banana Now-And-Later at the food court."
by daddybfree April 14, 2010