TYSB Share definition Flag Accronym for, “tuck your sack back”. Slang term for “get ready”. Created by fortnite battle royal player W2YM(word to your mother.) “We got a full squad at 330! TYSB!” TYSB by l3east0n February 2, 2019 0 0 Get merch Get the TYSB mug. Buy Now — $32.95 See more merch
