Thicctonary Share definition Flag A Thicctonary is girl who is smart or geeky and thicc e. g.man1: I've got a thicctonary man2: wow I'm so jealous my girls flat and stupid Thicctonary by ChAoS UKz August 2, 2020 0 0 Get merch Get the Thicctonary mug. Buy Now — $32.95 See more merch