poppaloppalin Share definition Flag Slang for 'WHAT'S UP' ?? but in a more 'hip' sense. -Hey JOEY!! What's POPPALOPPALIN?!?! -Nothing, just chillin. .........and so on. poppaloppalin by greatest trend setter in ATL October 24, 2008 0 0 Get merch Get the poppaloppalin mug. Buy Now — $32.95 See more merch