When you provide valid opinions for another individual with the means of helping that individual BUT in a direct, 'I don't give a shit about what you think' tone. The purpose of this direct tonality is to not beat around the bush and inform that individual of how it just is.
Friend: I want to talk to this girl in my class but I'm too scared!
Me: Grab your balls, stop bitching, and just do it.
Friend: Well....thanks for the constructive shiticism.