mambumpcious Share definition Flag the word for a male with a bunch of junk in the trunk!!!! or a very attractive male ;) 1. AJ and Adam are very mambumpcious 2. look at that guy he is so mambumpcious mambumpcious by Caylee January 14, 2008 0 0 Get merch Get the mambumpcious mug. Buy Now — $32.95 See more merch