noun
non-drinker; someone who cannot drink alcohol
Refers to a person who cannot drink alcohol, often due to low tolerance or personal choice. Contrasts with 上戸 (じょうご), a drinker.
See also: 上戸
私は下戸なので、お酒は飲めません。
I'm a non-drinker, so I can't drink alcohol.
彼は下戸だから、いつもウーロン茶を頼む。
He's a non-drinker, so he always orders oolong tea.
上戸 means a drinker or someone who can drink alcohol, the opposite of 下戸.
The term 下戸 (げこ) originally referred to a low-ranking household in ancient Japan, and by extension came to mean someone who cannot drink much alcohol, possibly from the idea of being 'low' in tolerance. The exact historical derivation is uncertain.