Any group of young developing girls strutting their stuff and continuously looking at their chests to see if they have grown any in the last five minutes.
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!