There is no standard terminology in testing so if you are unclear about a word or acronym being used, it's always best to ask.
Organizations will develop their own acronyms and values for words, so it's best to start there. When you hear a word or acronym, ask what it means. Then do some Google research to see what other people are saying or using the term for. Maybe look it up in a dictionary and form an opinion / understanding for it's value.
If it makes sense, make a list of your companies acronyms but not ones used by other people. Then use this list to research the topics and try to understand them with some depth. e.g What does it mean, what value does this provide, what are downsides, etc.??
Acronyms by themselves don't have much value or add to the conversation. If I said I'm an SDET in an Agile SDLC using TDD / BDD practices to write TCs in an attempt to improve QC and you were able to transfer those acronyms into the full words, would you have any better idea what I was talking about? Probably not.