Dbdb stands for dead beat douche bag ... a human being who mooches off of their parent their entire life. Doesn't have a job and sits on their parents couch after they wake up at 2:00pm and plays video games all day long.
Tim sits on his a@@ all day long on Moms couch and plays on his computer while watching TV .... he needs to get off his a@@ and get a job and stop asking mom for money!!! He's such a DBDB ugh!!!!
Acronym: don't be a douche bag
The bouncer lost his stamper; so he used a pen and wrote 'dbdb' on everybody's hand.