いける口くちMeanings1expression, noundrinker; person who can hold their drinkRefers to someone who can drink a lot of alcohol without getting drunk easily. Often used in the pattern 〜はいける口だ or 〜のほうがいける口.See also: いける彼かれは日本にほん酒しゅがいける口くちだ。He can hold his sake well.私わたしはどちらかというとワインのほうがいける口