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An alteration of "destash," which means to clean out your accumulated crafting supplies and pass them to others. This is usually accomplished by selling the supplies at a bargain price. Used mostly among crafters on etsy.com.

Not to be confused with "destache," which is to remove a mustache.
Etsy Listing: "Detash sale, Lot of 20 embellishments!"
by HiddenPaw June 23, 2011