Listening up is a term that refers to actively paying attention to someone or something. The opposite of listening up can be described as ignoring, disregarding, or overlooking. When we ignore something, we choose to not pay attention to it, while disregarding something means we do not consider it important or worthy of attention. Overlooking, on the other hand, means we fail to notice or acknowledge something that is in plain sight. Failing to listen up can result in miscommunications, misunderstandings, and missed opportunities. Therefore, it is important to practice active listening and to avoid actions that could be considered antonyms of listening up.