"Digress" means to go off topic or stray from the main subject in a conversation, speech, or piece of writing.
Sentences with «digress»
Always come armed with a couple of current events to talk about in case conversation stagnates, but don't digress into what your lactose intolerant body does when you accidentally ingest Gouda cheese. (lawyerist.com)
Time limits lecturers from digressing from the topic. (greenessay.net)
I'm going to digress for a second with regards to that game last season and just say that...... although they hammered us on that particular day. (justarsenal.com)