A KCURRAN is something that is annoying as hell. If your day gets screwed up or nothing is going right your having a total KCURRAN day. KCURRAN describes those terrible things in life that are sometimes unavoidable. Flat tires, bad hair days, crazy roommates are all KCURRAN!
When someone is being crazy, or heinous, its like "damn why are they so KCURRAN?"