noun

a person who drinks large quantities of alcohol.

drinker,heavy drinker,problem drinker,drunk,drunkard,alcoholic,dipsomaniac,alcohol-abuser,alcohol addict,person with a drink problem,tippler,imbiber,sot,toper,inebriate,lush,alky,dipso,soak,wino,sponge,barfly,juicehead,hophead,metho,tosspot,pisshead,piss artist