1 definition by N8andmcdcrew

used to say that someone is laggig in their work or falling behind dragging the "whole team" down

derived from the term "not the sharpest tool in the shed" well a "rusty nut" is not even in the shed its that random thing you found in your yard that you keep just in case you find what it goes to
Kristen is the rusty nut tonight man. she isnt getting her damn dishes done
by N8andmcdcrew August 4, 2009
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