Granny ass - One with a severe absense of "Junk In That Trunk". It can often be traced back to the looks of an elderly womans hind quarters which may be flat and not what might be reffered to as "eye candy".
by J.A.G. January 1, 2006
a person who has a granny ass
by jordy.n September 7, 2010
When you fucking a girl and she asks you to do her doggy style and you realize she was wearing butt pads to enhance her flat wrinkly ass!!!
Trav/sabs
Trav/sabs
by Trav/Sabrina June 5, 2015