1 definition by NYANNEONFVR

Top Definition
A disturbingly enthusiastic and adorable Poptart cat that shoots rainbows out of its ass while continually singing a very obnoxious but addicting song. NYAN NYAN NYAN NYAN NYAN NYAN ALL DAY LONG! Has been know to treat certain types of madness and increase hormonal levels in people under the age of 10.
Ex: www.nyan.cat
"I was able to watch that Nyan Cat video for 5 Hours, and now have a considerable amount of brain damage!"
by NYANNEONFVR June 02, 2011

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