People or things that flush, or devices designed to make something flow suddenly or forcefully.
From 'flush' (Middle English) plus the agent suffix '-er'. The term became common in the late 1800s as plumbing fixtures proliferated and different flushing devices were developed.
The word reveals an overlooked revolution: the invention of reliable flushing mechanisms completely transformed public health, yet we rarely think about the toilets and devices that made it happen. Modern flushers use as little as 1.28 gallons—a 50-year engineering journey.
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