When it comes to synonyms for the phrase "am ears in", there are a few options to choose from. One alternative would be to use the phrase "fully involved", which conveys the same meaning of being deeply engrossed or invested in something. Another possibility is to use the phrase "completely absorbed", which suggests a high level of focus or concentration. More informal options include "totally immersed" or "all in", which carry a similar connotation of being fully committed to a task or activity. Ultimately, the choice of synonym will depend on the context and tone of the sentence, as well as the writer's personal style and preferences.