tini bopper Share definition Flag Basically a kid between 10-15 that acts very immature but thinks they're cool and all the upper classmen hate them. That 7th grader in the skinney jeans is such a tini bopper. tini bopper by TeamOliviA November 16, 2009 0 0 Get merch Get the tini bopper mug. Buy Now — $32.95 See more merch