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"Going down the rathole" vs. "Going down the rabbit hole."
Foreign Aid: Money Down A Rat Hole? - Forbes
Rat hole - Idioms by The Free Dictionary
Billionaire Backs Away From Haley: ‘You Don’t Throw Money Down a Rat Hole’
pound sand down a rathole – Dictionary of American Regional …
go down the rathole - WordReference Forums
What does the phrase "head down the rat's hole" mean here?
How to Get Rid of Rat Holes in the Yard - Tips Bulletin
Federal Narcotics Laws and the War on Drugs | Money Down a Rat Hole
RATHOLE Definition & Meaning | Dictionary.com