bouncage Share definition Flag when a big breasted woman runs and her boobs jiggle like frog taped to the back of a moped. it is a wonderful thing (unless of course she is a fatty) I liked the bouncage i saw yesterday at the park bouncage by clump September 2, 2004 0 0 Get merch Get the bouncage mug. Buy Now — $32.95 See more merch