nittydem Share definition Flag Referring to a group of nitties or the community that nitties live in. A portmanteau of nitty and mandem "Damn bro I didn't know you belong to the nittydem""Aye, look at the nittydem" nittydem by Spedf March 26, 2024 0 0 Get merch Get the nittydem mug. Buy Now — $32.95 See more merch