1. something I'm not interested in or excited by (or good at)
Professional
Social
I'm not interested in, it's just not my thing/bag/cup of tea
When you say something is 'not your thing', 'not your bag' or 'not your cup of tea', it is a polite, informal way of saying it is something you are not interested in or excited by. "I like going to the cinema but action films are not my cup of tea, I prefer comedies." If something is 'not your thing', 'not your bag' or 'not your cup of tea' it means you don't like it. These are useful expressions for saying you dislike something without insulting someone who does like it.