a term used to describe the act of vigorously stroking the penis at a pace that generates a ‘mashing’ sensation. Also closely related to 'mashin the nana'.
by tripppers May 30, 2011
"Man, that Lachy fuck is such a mashed potato banana,"
"50% of us is banana, 50% of us is potato, that fuck is a total mashed potato banana"
"50% of us is banana, 50% of us is potato, that fuck is a total mashed potato banana"
by Mashed Potato Bananananananana July 21, 2017