The odd thing is, while most insults or slurs we use are pretty general purpose, D.B. seems to be reserved for a select few in our daily encounters.
What in your mind constitutes someone being a "douche bag".
Personally, I apply the term to people that are overly narcissistic, pretentious, egotistical, or superficial. Mostly I apply it to men in their 20's who seem to shop exclusively from Ambercrombe and Finch, or similar fashion victim haunts.
What makes you utter the D.B. term when you see someone on the street?