Fat emo kid. Usually with a pierced lip and bleached or partially bleached hair. Wears girls clothes, but still not in bigger sizes than normal emo kids.
Hey look at that emosphere over there, even I wouldn't fit into those jeans.
Simply put: An acronym for Doctor Fingered Butt
It is important that this is not the same thing as a normal prostate check-up, but rather an incident in which the recieving party has something wrong with them. This originated in a school after a kid was found to have become a DFB as a result of not shitting right.
John had another doctors appointment yesterday, he's such a DFB