habitual drinker; regular drinker
Refers to someone who habitually drinks a particular beverage, often alcoholic, but can be used for coffee, tea, etc. More formal than 飲んべえ.
He is a habitual coffee drinker and has at least five cups a day.
This whiskey is loved by many regular drinkers.
Compound of 愛 (love) + 飲 (drink) + 者 (person). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for 'habitual user of something'.