What Is A Polygon With 4 Unequal Sides Called?

According to wikipedia, a trapezium (or irregular quadrilateral) is the closest to a name a quadrilateral is called with 4 unequal sides. It says a trapezium has no parallel sides, but even in this case, two non-adjacent sides may be of equal length. If you really want a name, call it an irregular quadrilateral or a noname (pronounced no-nom-ee).