Abbreviation for Itty Bitty Titty Committee. Used by small breasted girls as an excuse to leave a an uncomfortable situation or to talk about how well endowed other girls are without sounding overtly jealous
Sorry Mrs. P, I can't babysit your twins tonite. I have an emergency I.B.T.C. meeting back at school in an hour!
by Chaquita Binini January 27, 2011