Top Definition
A young adult/teenager that dresses like a grandma or way too old for their age, they usually appear to be very awkward and shy. They typically wear long socks, tennis shoes, shirts that do not fit properly and their haircut is usually outdated.
Wow that girl is such a grandma kid! She always looks so scared when I say hi to her!
by Dr. Love18 September 05, 2011
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