When you're talking about something specific to another person and you end up going completely off track leading you to talk about multiple other random un-related topics before coming back to conclude your original point.
"Since I have to go, can you get to your point and stop chasing rabbits?"
"He was chasing rabbits again and I couldn't tell what he was trying to say."
"I'm sorry, I was chasing rabbits for too long and I don't know how this conversation started anymore."
Something that is very common to observe Mensa (high IQ) members doing when discussing a topic. They'll start off on one topic, but will usually veer off topic several times in rapid succession and end up talking about something totally different than when they started. This can happen within first few minutes of the discussion.
A term used to describe getting distracted or outright losing track of reality- often in reference to drug use, but also a term used sometimes by mentally ill people to describe a dissociative episode or the feeling of slipping into a flashback related to PTSD.
When you are on a binge of mind altering substances and spiraling out of control on your journey to Wonderland. Beware The Red Queen. She means to take your head and eclipse your soul in darkness for eternity.