"Wast all ears" is an idiomatic expression that means to eagerly listen or pay close attention. Antonyms for this phrase may include "tune out" or "disregard," which imply a lack of interest or attention. Other antonyms may include "neglect," "ignore," or "overlook," which indicate a failure to give proper consideration or attention. Another antonym could be "distracted," which implies being preoccupied or easily distracted from listening. To not be "wast all ears" could also mean not paying attention fully, so antonyms might include "half-hearted," "uninterested," or "apathetic.