A parallelogram is a quadrilateral with opposite sides that are equal in length. It's like a diamond, but not as sparkly.
Here's an example of a parallelogram:
See? It's just a bunch of squares with a fancy name. But don't worry, we're not going to make you do any math or anything boring like that.
Want to learn more about other shapes that don't care about right angles? Check out our page on Elongated Circles.