1 definition by ThePrimMs.

A guy that is SMOKING hot in his teenage years then turns onto a lump of ugly shit the second he hits 20. He is also usually a paint sniffing meth addict, and an EXREME man whore!

* this definition also applies to females. Only the term is Koba instead of Kobo
Katy: I remember this guy that I dated in high school.... Ahh damn he was hot!
Jessica: Whatever happened to him? Is he dead or something?
Katy: No its nothing like that. He just got really fucking ugly one summer! He turned into a major Kobo so I dumped him!
Jessica: Ohhh that's harsh!
Katy: No that's just anybodies reaction to a Kobo.
by ThePrimMs. July 21, 2011
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