stands for “i don’t belong in this club”. the band WHY DONT WE, posted yesterday on instagram the abbreviation. hopefully this definition will help some limelights that are searching for the answer to what it means :)
The most amazing group of women, having small tits, ranging from a small B to AA. The smaller the tits, the higher ranking officer you will be and thus having more power.
"I used to like big tits when I was 15, but now that I'm 30, and my wife's tits cover her vagina, I wish I was with someone from the IBTC!"