T.I.A.C Share definition Flag A nickname for anyone refered to as a name beginning with T, stands for 't' is a cunt. Inspired by my friend Tommo. have you seen tommo? who tommo who T.I.A.C yeah he's been a cunt somewhere probably T.I.A.C by Papeys cousin, blue January 15, 2009 0 0 Get merch Get the T.I.A.C mug. Buy Now — $32.95 See more merch