IBTC Share definition Flag Itty Bitty Titty Commitee-When a girl has a nice ass and a nice body and a pretty face but their tits r small. This Chick was a hot milf but she was in the IBTC(Itty Bitty Titty Commitee) IBTC by Brian Rosenblum September 8, 2006 0 0 Get merch Get the IBTC mug. Buy Now — $32.95 See more merch