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A granny Fraggler is a person who likes to have woohoo with the elder generation.

To granny fraggle, is to hit on an old male or female

Granny fraggling is also a general insult for someone who gets on your nerves
See that Chris, hes a right granny fraggler.

David was seen in the pub trying to granny fraggle that old biddy.
by DJ-Dim March 08, 2007