hard drinker:
(also ‘heavy drinker’; plural: ‘hard drinkers‘)

a hard drinker
a person who takes strong alcoholic drinks, such as whiskey, rum, brandy, or a lot of less alcoholic drinks such as beer, wine, etc.;
a boozer;
an alcoholic,

a hard drinker of less alcoholic drinks
e.g.
Russell’s been dismissed from his security duties because he’s a known hard drinker.
Do children of the parents who are true hard drinkers tend be hard drinkers themselves?
There are several institutions that try to help hard drinkers/heavy drinkers to stay away from alcoholic drinks, some of them credited with 50-50 success rate.
Very few hard drinkers are capable of stopping drinking on their own; most of them need some strong external force to keep them under control.
For a news article that shows us how we come across this word in our daily browsing, please click here, for an entertainment news article about a popular star not being a hard drinker, please click here, for a forum discussion of mothers being hard/heavy drinkers, please click here and for an item of news about cheaper drink for hard drinkers, please click here.
