rathole

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rathole

[′rat‚hōl]
(mining engineering)
A shallow, small-diameter, auxiliary hole alongside the main borehole, drilled at an angle to the main hole; after core drilling is completed, the rathole is reamed out and the larger-size hole is advanced, usually by some noncoring method.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The Republicans had swept Congress, and Jesse Helms was grousing about the bottomless "foreign financial ratholes" (e.g., my Maryland checking account) into which AID was shoveling money.
This is why, for most of human history, the odious have been confined to their ratholes, or occasional street-corners.
Jesse Helms, North Carolina's formidable Republican, dismisses most foreign aid as money thrown down "foreign ratholes."