is for Douchebag.
A word that once meant “a small syringe having detachable nozzles for fluid injections, used chiefly for vaginal lavage and forenemas” has gone on to describe “contemptible or despicable person”. As mentioned on Frankly Curious, douchebag was even chosen as Word of the Year. We live in a wonderful era where a simple word for a gross necessity can go on to become a celebrity.