Ok well tonight we started a war and lost 15 to 14. What was really annoying is that we were 4 ahead with 14 to 10 then it went downhill from there. Hubris got us.
Hubris (/ˈhjuːbrɪs/, also hybris, from ancient Greek ὕβρις) in religious terms means extreme pride or self-confidence that leads to offense spoken or done towards the God(s), usually harshly punished after. This religious meaning is often transferred to denote overall highly unacceptable, arrogant and insulting behaviour that confronts ethical norms in a way that reminds one of the act described in Ancient Tragedies (like Oedipus).
Hubris is usually perceived as a characteristic of an individual rather than a group, although the group the offender belongs to may suffer consequences from the wrongful act. Hubris often indicates a loss of contact with reality and an overestimation of one's own competence, accomplishments or capabilities, especially when the person exhibiting it is in a position of power.
So yes. Don't overestimate yourself and go easy when you are winning. It will bite you.