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calcium, lime, rust, and other such unsavoury substances, especially those tough to clean ones
"Man you just spilled 5 litres of bucket water on my carpet! That's grust."
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calcium, lime, rust, and other such unsavoury substances, especially those tough to clean ones
"Man you just spilled 5 litres of bucket water on my carpet! That's grust."
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Get a grust mug for your papa Jerry.