Brutal Honesty or Big Mouth

I tend to be brutally honest to the point where I probably share too much (AKA TMI = too much information). I don't want to be lying, so I share almost everything. Unfortunately, it's not well received. Brutal honesty- like out of the movie with Tom Cruise, but I can't recall the film name at the moment. I hate it when I mess something good up. I'm kicking myself right now.