What is habitual lying?

I, although have no medical experience, do believe it is. My whole life has been a lie. My mother lied to me till the day she died. My ex husband lied to me throughout out 12 y marriage, and my younger brother is just as bad. And it isn't about anything important. It seems as though most of it is to make themselves look beter. Their lives aren't as important as they would like them to be, so lying and making themselves out to be something else, feeds their egos. Its really sad, because they actually don't understand the impact their lies have on the ones aroud them.