Top Definition
Young adolescent girls who dress like they're grown up thus implying that they give the poon like they're experienced women, when in reality they're poon is too immature. And so, they are poon juniors...Pooniors.
I went to the mall today and saw this 16 year old poonior wearing a thong and flirting with me like I wouldn't break that in two.
by urgdalmighty January 28, 2008

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