口くちが肥こえる

expression, ichidan verb

have a refined palate; be used to eating the best

Describes someone whose taste in food has become discerning through experience with high-quality cuisine; often implies being hard to please with ordinary fare.

• 彼かれは世せ界かい中じゅうの高こう級きゅう料りょう理りを食たべてきたので、口くちが肥こえている。

  He has eaten fine cuisine from around the world, so he has a refined palate.

• 口くちが肥こえた人ひとでも満まん足ぞくできる味あじだ。

  It's a flavor that can satisfy even someone with a discerning palate.