rat-hole 

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.

rat-hole by The Colonel July 18, 2003

Rat-hole 

A dirty, dingy room, or apartment.

Why don't you clean this rat-hole up?

Rat-hole by Rod Brock May 22, 2006

Rat Hole 

a person who is being extremely annoying. It is a combination of the words rat and asshole. It can be used in anger or towards a friend in a joking matter.

Wow omg I cant believe you stole my cookie, you’re such a rat hole.

Rat Hole by ultimate rat February 26, 2020

rat hole 

A place where you put some money to save that no one knows about.

father to son...... Son, you better rat hole some money.

rat hole by steven algren December 28, 2008

rat hole 

A person or friend, outside an entity to secretly move money or launder money making it appear to have earned money legally.

He persuaded friends outside the company to act as “rat holes”, handing them stakes in each new issue, which would belong to that person on paper, but which, in fact, would be originator's money and originator’s stake.

rat hole by unirobber April 23, 2018

Rat Hole 

Made famous by the TWIT podcast Macbreak Weekly, a rat hole is when a discussion follows a constant tangent and ends up with a topic that has nothing to do with the original discussion.

That discussion of Macs which changed into a discussion of classical music was quite the rat hole.

Rat Hole by Steven Legault January 21, 2008

rat hole 

where rats live. aka the gutter.

Caruso comes from a rat hole.

rat hole by suhockey13 September 5, 2008