What is another word for being to ears in?
Pronunciation: [bˌiːɪŋ tʊ ˈi͡əz ˈɪn] (IPA) 
The phrase "being to ears in" refers to someone who is very familiar with something, or in other words, someone who has heard something repeatedly and knows it well. There are several synonyms for this phrase, including "familiarity," "acquaintance," "proficiency," "expertise," and "knowledgeability." These words all convey the idea that someone has spent time and effort becoming familiar with a particular subject, and has developed a deep understanding of it. Whether it's a skill, a topic of conversation, or a musical piece, someone who is "being to ears in" is someone who knows what they're talking about and can speak confidently and authoritatively on the subject.
