A person who is a white version of a "big daddy". They often wear the clothes that a "big daddy" would wear in order to be perceived as a "big daddy"
Hey, have you seen the B. Daggitty who just moved in down the block? He's got a gold chain and everything. Doesn't he know that this is Richland? ( a made up name for a predominantly affluencial community not apt to be containing people who enjoy waltzing around with gold chains and rapping a lot).
from Battlestar Galactica -- a daggit was an ugly dog-like critter, so it's used as a generic insult, in place of bitch, especially at school. Extra value, as it rhymes with faggot.
Judy: Oh, Brends, you're such a daggit!
Teacher: What did you call her?
Judy: that cute little alien critter from Galactica cuz Brenda's acting silly!