What do you call a quadrilateral that has exactly 1 pair of parallel sides?

Oh, dude, that's an easy one. So, like, a quadrilateral with exactly 1 pair of parallel sides is called a trapezoid. It's like a fancy Word for a shape that's a bit lopsided, you know? So, yeah, next time you see a wonky four-sided figure, just be like, "Hey, that's a trapezoid!"