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An older female, usually recently divorced or widowed, who has re-ignited a social life. Grabby grannys tend to think that once they have found their social life again they instantly revert back to the body of their teenage years, and thus dress like they're teenagers. They are overly touchy-feely toward men usually half their age. An ugly cougar.
"Coopers mum is such a grabby granny"

"That bar is full of grabby grannys"

"Im not even drunk and id root that grabby granny"
by milphunter March 09, 2015
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