Top Definition
Something so rainbowtastic that walks in the bathroom that you laugh so hard that you drop to your knees.
When Danielle and Kylee saw Corinne, Danielle became kneesterical ...

In art class and having the whole class think you are the biggest whore in the world and just love to laugh at you and love that you are whore is a like a kneesterical situation....
by Onherkneesinthebathroom October 03, 2009

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