Top Definition
One who attempts to stick his entire fist (sometimes both) inside a woman above the age of 65.
1. Ethan, you're such a grandma fister. That bitch was old as hell.

2. Damn Ethan quit your grandma fisting older women and do your homework!
by Connor James Plaza November 16, 2011

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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Soft and offensive. Just like you.

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Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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