When a douchebag translates (in their mind) someone's query as a greenlight to offer their negative opinion on a subject within the query, but not the main subject at hand, offering no help whatsoever.
"Hey everyone, Angie and I are thinking burgers tonight. Any suggestions on the best one or your favs?"
"OMG red meat's so bad for u. It's so fatty and stays in ur large intestines for years!"
"Thank you for the douchelation, but I'm asking what the best burgers in town are, not your opinion on red meat."
A fad that someone gets caught up in that ultimately makes them look like a douchebag. Some examples are: The faux hawk, popping collars on a polo shirt, getting a tramp stamp, spray on tans or wearing Ed Hardy clothing.
Friend #1: Did you see that Larry grew a 70's pornstache?