1 definition by kikido

Top Definition

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"

by kikido January 16, 2014