What is Rat-hole?
1.
To digress in an extensive way. To divert the conversation to a topic that is not only unrelated to the topic at hand, but a topic that will likely have no immediate resolution either.
That's an interesting discussion, but let's stay on track and not go down a rat-hole.
See
2.
A dirty, dingy room, or apartment.
Why don't you clean this rat-hole up?
See
Random Words:
1.
The experience of having someone make a promise and not come through on it.
"The band said they were going to show up tonight, but..