Definition of mud rush in US English:

mud rush

noun

  • Mudslide.

noun

  • 1A rush, Juncus gerardii, that grows in salt marshes in north temperate regions; also called saltmarsh rush.

  • 2Any of several clubrushes belonging or formerly belonging to the genus Scirpus.

Origin

Early 20th century; earliest use found in Science<br>early 19th century; earliest use found in James Edward Smith (1759–1828), botanist.