A key socioeconomic indicator of how much a place, person, or group of people have Douchebag qualities.
Jeff: Dude I'm buying real estate here, look at all the hot swimsuit models and the tanned guys with abs
Tim: That place has a high DBI (Douchebag Index)
Jeff: What does that mean?
Tim: You're better off living in an Igloo next to an active volcano
Jeff: But then what if my Igloo springs a leak?
Tim: You'll have some lava in the living room big deal. At least you'll have a low DBI.
Stands for "Douchebag In The Locker Room." Everyone can spot a douchebag, but not everyone can spot a Douchebag in the Locker Room or DBITLR. A DBITLR is a man who most women think is sweet, caring and even naive. No way; it is all an act. This is the public persona. The DBITLR reveals his true self to the other boys in the locker rook. The guys know he is a DB, but the girls are clueless.
That Mike Seaver from Growing Pains -- total DBITLR. Other notables include: Kobe Bryant (pre-accusation) and Scott Peterson (pre-Lacy murder). Kobe and Scott are now DBs, but qualified as DBITLRs in their more innocent days.