The phrase 'being one's ears in' refers to paying close attention to someone or something. Antonyms for this phrase could include being oblivious, inattentive, or careless. It could also mean being distracted or disinterested. When someone is not being one's ears in, they are likely missing important information or failing to respond to a situation appropriately. On the other hand, actively listening and being one's ears in can help in developing strong relationships, staying informed, and making good decisions. By paying attention and staying engaged, individuals can avoid misunderstandings and achieve better outcomes.