useless sack of potatoes Share definition Flag A useless sack of potatoes is very useless like me,they are to smart and not cool Girl 1:omg look at that useless sack of potatoes! Girl 2: she is so fucking gugly useless sack of potatoes by #uselesssackofpotatoes May 23, 2018 0 0 Get merch Get the useless sack of potatoes mug. Buy Now — $32.95 See more merch