Means white trash. It refers to someone who lives in a trailer park, drinks excessive amounts of beer, frequents Walmart often, and if all these things are true, even more "whashy".
by Matty.ice123456789 April 10, 2015
When one (usually a male) needs to both pish and wash (usually due to BO), resulting in the need to "whash". Originated in Strasbourg, France.
by StuntmanSteve April 21, 2009