DIBS is an acronym for Dick Intergrated Ball Syndrome/Sack. It is a common occurance for persons of a certain decendancy or of slight obestity. A person has DIBS when their penis is so small there scrotum overpowers it and is more prominent.
Basically their penis is very small however their scrotum is very large.
After gym class when a lad has encountered a bit of gitch they go to have a shower and remove their underwear. To the other class mates shock they see an overly large ball sack (scrotum) and find it hard to see his penis. They then exclaim
'wow, he's got DIBS!!!'