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1.
A place where you put some money to save that no one knows about.
father to son...... Son, you better rat hole some money.
de steven algren 28 décembre 2008
 
2.
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.
de The Colonel 18 juillet 2003
 
3.
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.
de Steven Legault 21 janvier 2008
 
4.
A topic of conversation that has diverted wildly from the original conversational thread and is generally viewed by all (but the one leading the topic) as being without resolution, or at the very least is uninteresting to others in the group. Ratholes usually open up when related but tangential topics are discussed which are explored in much more detail than is required for the relational reference to the original thread.
I was trying to keep things on topic, but you've opened up a big rathole with all this talk of comic book plot twists.
de Stark Raven Mad 2 août 2007
 
5.
Ratholing can take the form of scamming someone or just generally handing them a bad beat. A rathole can also be an income account in the world of accounting and finance.
Debit Magic Online Inventory, Credit Rathole
de BoddyT 6 août 2011
 
6.
A dirty, dingy room, or apartment.
Why don't you clean this rat-hole up?
de Rod Brock 14 mai 2006
 
7.
A person or thing acting in an annoying manner.
My sister was being a rat hole because she wouldn't stop singing.
de 10532067 19 octobre 2011