A Skewb is a cubic puzzle with an interesting twist, the core is turned so that the sides are not twistable. Instead you turn the puzzle at the center, making the corner the center turning axis. Once you gain an understanding around the turning of this puzzle then it is actually a relatively easy solve as there are less pieces to put in pace than a regular 3x3 cube.
Skewb is also an official WCA event. The world record Skewb solve is less than a second