cowboy shower

Noun

 * 1)  A simple shower in a horse trailer's living area to remove the dirt and grime associated with working around livestock.
 * 2) * 2015 Aug. 15, Stephen Louie “Hosspuller”, "A Cowboy Shower for your Horse Trailer," mrtruck.com (retrieved 11 Sep 2016) :
 * A “cowboy” shower usually means a shower set up in the horse area of a trailer. Cowboy showers may be warm or cold water.
 * 1)  A simple shower in a mudroom to remove the grime from the outdoors and the workday, before entering into a home or ranchhouse.