fur up
Intermédiaire supérieur (B2) informal
When the inside of a kettle or pipe gets a white crusty coating from the minerals in water.
"Our kettle furs up so quickly — we have to descale it every few weeks."
When the inside of a kettle or pipe gets a white crusty coating from the minerals in water.
"Our kettle furs up so quickly — we have to descale it every few weeks."