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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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Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
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