The act of, pouring an ICEE down an old woman's snatch and proceeding to eat it until you get a brain-freeze.
I went to a retirement home and gave this woman a frosty grandma.
by SystemOffline January 11, 2011
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The type of person youd find lurking around a social media app, disguising their user as "grandma frosty" they're a good, true friend who will stuck with you to the end. However, this is both a blessing, and a curse. A grandma frosty is almost always a crack head, or a pure clown. If you ever meet one, make sure to show them lots of kindness and support, as they are human like you, and need help at times.
Lavender: hey, did you see that new person who joined?

Egg Nogg: yeah, I heard they were a grandma frosty

Lavender: dammit

Egg Nogg: well hey a new crack head to join our cult.
by Random ldiot June 13, 2020
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