Twinsync Share definition Flag Being so in-sync with someone, you could be twins; alternatively defined: the moment when, in two separate places, twins do the same thing at the same time. Abby and Lily were so twinsync, they readily completed one another's sentences. Twinsync by 2NMom August 22, 2011 0 0 Get merch Get the Twinsync mug. Buy Now — $32.95 See more merch
