Blunt. Candid. Brutally honest. All mean the same thing. You are about to tell someone something they don't want to hear.
I just started a new job in Phoenix (puh-ho-nicks according to the silent cowboy) and because I am in a new place and am not totally comfortable with the people I'm around, I've started to notice that I have an alter-ego. His name is Francisco, I call him Frank for short. For example, there is this lady that is SOOOOO loud, overweight and just being around her you would understand. Anyways, one day she was in her huge SUV stopped in the middle of a parking lot so no one could get around her. After a couple minutes of waiting, I could feel Frank wanting to get out of my car, walk up to her window and calmly say "excuse me, but you could please move your fat ass so I can get out of the parking lot?" Don't worry, Steve prevailed. Other similar situations have risen in the past week.
Thankfully I have enough sense NOT to let Frank win too often. However, when someone is gloating about their mediocrity (aka backup receiver at a sub-par university) Frank takes over and helps that person realize how little they really have achieved and that they really have nothing coherent to say back to you.
Now I'm not condoning being blunt, but sometimes it's a necessary evil. Truth hurts occasionally. And if you don't like it, you can leave.