noun
poor taste in food; unsophisticated palate
Colloquial term for someone who cannot appreciate subtle flavors or who has low culinary standards. Often used self-deprecatingly or to tease someone who enjoys cheap or simple food.
See also: 貧乏舌
私は馬鹿舌だから、高いワインと安いワインの違いがわからない。
I have an unsophisticated palate, so I can't tell the difference between expensive and cheap wine.
彼は馬鹿舌で、コンビニのおにぎりが一
He has poor taste in food and says convenience store rice balls are the most delicious.
Similar meaning, but 貧乏舌 emphasizes a palate accustomed to cheap or poor-quality food due to poverty, while 馬鹿舌 focuses on lack of discernment regardless of economic status.
Compound of 馬鹿 (fool) and 舌 (tongue), literally 'fool's tongue'. The exact origin is uncertain, but it likely arose as a colloquial metaphor for an undiscriminating sense of taste.