According to the Oxford Dictionary, a drunkard is someone who is habitually drunk or who drinks to excess. The term is often used as an insult to describe someone who is an alcoholic, or is frequently drunk and engages in inappropriate behaviors. It can also be used to describe someone who is intoxicated, or has been drinking an excessive amount of alcohol in a short period of time. The term implies that the person is not in full control of their behavior and that they lack self-discipline, as drinking to excess can have damaging consequences.