» Mudslide redirects here, it's also the name of a cocktail. A mudflow or mudslide's the most rapid (up to 80 km/h, or 50 mph) and fluid type of downhill mass wasting. It's a rapid movement of a large mass of mud formed from loose earth and water. Similar terms are mudslide (not very liquid), mud stream, debris flow (for example in high mountains), jökulhlaup, and lahar (from volcanoes, see also pyroclastic flow). However, these terms show a broad variety in water content (from loamy mud,… (More on Mudflow)