Originally Posted by
crbnftprnt
After 507 pages, it's pretty clear how the term is used. But what's the original metaphor?
Seriously? I'll give you hints.
1) Can be useful when "instrument" flying
2) Richard might be a tool
3) What else do junior high kids and their mental equivalent talk about?
4) OPP
5) Definition 2d here.
Tool - Definition and More from the Free Merriam-Webster Dictionary