Drunkard

One who habitually engages in the overindulgence of alcohol.

In order for an individual to be labeled a drunkard, drunkenness must be habitual or must recur on a constant basis. A person who regularly drinks heavily but is sometimes not under the influence of alcohol would be considered a drunkard, whereas a person who occasionally gets drunk would not. The test is the question of whether or not excessive drinking has become a frequent behavior pattern for a particular person.