Abbreviation for Brother Complex.The state of having a strong attachment/attachment to a male brother> My sister's friend came to visit me at home. It seems that the two of them are practicing dancing, and if you take a peek, you can see that the big breasts of my sister and her friend are bouncing around!My friend found out that I was preoccupied with my chest, but he asked me, "Do you want to see my brother's breasts?" My little sister came in and made a fuss!At the end I was sandwiched between two big boobs...