Bitty Snack Share definition Flag Bitty Snack (n.) - A phrase used in substitution of "to breastfeed" and/or to describe a light daytime snack such as a biscuit/slice of cake. 1. "It's time for your bitty snack"2. "BITTY BITTY SNAAAAAAAAAAAAAAAAAX!" Bitty Snack by BillyBrownSnax November 21, 2011 Get the Bitty Snack mug.