The phrase "is all ears" means to be fully attentive or listening closely to someone or something. Antonyms for this idiom could include being disinterested, indifferent, or preoccupied. When someone is not all ears, they may be distracted, uninterested, or inattentive, causing them to miss important information or communication. Alternatively, someone who is all ears could be described as attentive, engaged, or focused. Overall, antonyms for "is all ears" focus on describing a lack of attention and engagement, whereas synonyms highlight the importance of active listening and paying attention.