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adjective. originted in Peoria, Illinois. a combination of the words "unique" and "spontaneous"; hence, meaning someone who is unique and spontaneous.
Jason: Wow. That new kid Nick is wearing purple skinny jeans and a headband, and his locker has pictures of pregnant goldfish in it.

Austin: Yeah, he's pretty goddam euphoneus.
by grlwholvd April 12, 2009
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