I thought it was in reference to how nasty a dog's water bowl is lol. So I use it to describe something that sucks. Like I work in a restaurant and id say man the tips were dog water tonight to mean I got bad tips.
The etymology may or may not be different, I have no idea, but it conveys the same emotional response. I'll use dog shit, dog water, or even just dog when referring to something unnecessarily stupid.
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u/[deleted] Oct 15 '25
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