sometimes used angrily as a response; to reject someone else's idea
sometimes used calmly, as a conclusion, expressing that although something has been given much thought and consideration, or is important, the thinker does not care anymore; to reject one's own idea
person 2: to hell with that! i have finals in the morning!
person 1: hey lets all go to that party and get drunk tonight!
person: well, i have my final exams tomorrow morning and i really should be studying and not going out, but to hell with that! wheres the party at?