FTS Share definition Flag FUCK THAT SHIT. Similar to the way LOL or BRB are used, FTS is an acronym that can be used in varying circumstances. That bitch was all up in my face and I was like... "FTS" FTS by Ari55 June 30, 2006 0 0 Get merch Get the FTS mug. Buy Now — $32.95 See more merch