Word Sponge Share definition Flag A person who is devoted, and addicted, to reading. Jimi Herndon is a serious "Word Sponge"! He soaked up 72 books in 52 weeks! Amazing! Word Sponge by talk2me-JCH2 March 7, 2017 0 0 Get merch Get the Word Sponge mug. Buy Now — $32.95 See more merch