I believe the answer you'd be looking for is a normal quadrilateral.
There is no specific name for a four-sided polygon with unequal sides.
a quadrilateral trapezoidA polygon with four unequal sides is a quadrilateral, as is a square, rectangle, trapezoid and parallelogram.
Quadrilateral
"What polygon has 5 unequal sides?" An irregular pentagon is a polygon that has 5 unequal sides.
A polygon whose sides are unequal is called an irregular polygon. It may then be further described as being concave or convex.
It is classed as an irregular polygon when it has unequal sides.
A polygon with four unequal sides is a quadrilateral. A polygon with five sides is a pentagon. The polygon with the least number of sides is the triangle.
The polygon with four unequal sides is known as a trapezium. Outside of North America is called a general irregular quadrilateral.
Rectangle
Rhombus
A quadrilateral
A regular polygon has equal angles AND sides.