Hypocrisy is ...
Luke 12:1 "In the mean time, when there were gathered together an innumerable multitude of people, insomuch that they trode one upon another, he began to say unto his disciples first of all, Beware ye of the leaven of the Pharisees, which is hypocrisy."
This is the biblical definition of a hypocrite, "someone whose words and heart (actions) don't agree." A hypocrite may act the part of a Christian or talk like Christ, but he or she won't do both. Hypocrisy is defined by the dictionary as, "The feigning of beliefs, feelings, or virtues that one does not hold or possess; insincerity" (American Heritage Dictionary). In the Greek, the word is "hupokrisis" and means "the playing of a part on the stage."
Hypocrisy is often said to be doing something even though you don't want to or feel like doing it. It is true that God demands that our motive and reason for doing things be right, but this does not mean that we always want to, or delight in, doing something. To do what God wants you to do, or to do unto others what you would want them to do unto you, is not hypocrisy (Matthew 7:12) -- even if you don't feel like doing it. It is hypocrisy only when your motive for doing it is wrong and you're not genuinely seeking the welfare and benefit of others. Remember, Jesus didn't feel like going to the cross, but He went anyway to seek the welfare and benefit of the world.