A phrase said by a douche bag to a weak soul after committing an act of douchebaggery to them. This is said in an attempt to point the blame to the victim rather than yourself.
Steven: Patrick...don't you think you've had enough to drink tonight?
Patrick: Don't be a douche bag!
Patrick: I'm hungry (Takes lunch money)
Steven: HEY! thats mine! My mommy gave me that!
Patrick: Don't be a douchebag!
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.