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"Shut Down" is redundant.
(lemmy.world)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
That depends on the direction of the opening. Shut up means basically the same thing as shut down, but the hinged part operates in the opposite direction.
And I think you shut up a mountain cabin.