having no sense of taste; taste-blind
Refers to a person's inability to discern or appreciate flavors, often used colloquially for someone who is not picky about food or cannot tell good food from bad.
He has no sense of taste, so it's pointless to cook expensive meals for him.
People who are taste-blind often can't tell the difference between flavors.
Compound of 味覚 (taste) and 音痴 (tone-deafness), literally 'taste tone-deafness'. The term extends the metaphor of being tone-deaf to the sense of taste.