1 definition by kikido
A horrible form of bathing suit, a hybrid between a speedo and a thong. Usually spotted on older men with beer bellys and fake tans.
e.g. 1: Person wearing a spong: "Ask me about my spong!!!"
e.g. 2: "Ew! Rob shouldn't be wearing a spong"
e.g. 2: "Ew! Rob shouldn't be wearing a spong"
by kikido January 17, 2014