You've heard the term "HANGRY", right? When you're so HUNGRY you get ANGRY! Guess what...its scientific thing! When we're hungry we get more irritable because our blood/glucose levels are low and makes it more difficult to concentrate and more likely to snap at the people around us for the dumbest reasons!
Oh and one more thing...if you have a court date...pray you see the judge first thing in the morning or right after lunch 'cause judges usually give harsher sentences when they're hungry and lighter ones on a full stomach...or so they say!