a name used to replace the surname of someone who is meant to be solid
or hard. usually the user of the name is a chav
, trying to increase their reputation, or someone taking the piss out of a chav. it is taken from the popular film 'rocky' where rockies last name is balboa, and rocky being a boxer, meaning he is tough.
usually the user of the name is not actually that hard at all, they are usually, infact a pussy