Sassiness Share definition Flag An undeniable amount of spunk and cuteness in one's speech. A person's sassiness can make the most ordinary phrases sound delightful. Her letter retained a high level of sassiness. It mesmerized the reader. Sassiness by Tdove93 September 23, 2011 0 0 Get merch Get the Sassiness mug. Buy Now — $32.95 See more merch