It's a specific term used in the ECMAScript specification [1]. That refers to any object for which at least one internal method does not behave like for a stand

It's a specific term used in the ECMAScript specification [1]. That refers to any object for which at least one internal method does not behave like for a standard object created for example with `{}`. [1] http://www.ecma-international.org/ecma-262/ http://www.ecma-international.org/ecma-262/