Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Stupid people piss me off...busted my ass...and my coworker takes off with all the tips...thnx for nothing  #thatsmyluck
This tweet contains emotions: 
anger, disgust, pessimism, sadness