Sisi Share definition Flag Word to describe A beautiful,loyal,and funny female that is easy to love but can be really crazy and mean at the same time. “My girlfriend reminds me of a Sisi she’s so easy to love but at the same time she’s so crazy”. Sisi by U.D.B June 4, 2018 0 0 Get merch Get the Sisi mug. Buy Now — $32.95 See more merch