Lilly Share definition Flag Lillies have THICC booties and nice titties but awful personalitys and in the end leave you for your best friend. Guy 1: Hey Lilly's got a nice ass on her.. Guy 2: watch out tho she'll fuck you and your friend. Lilly by _baby_got_back_ May 17, 2018 0 0 Get merch Get the Lilly mug. Buy Now — $32.95 See more merch