Does a person 'skew' or 'skewer' a shish kabob?

A person 'skewers' a shish kebab. The term "skewer" refers to the action of piercing food with a long, thin object, typically a metal or wooden stick, to hold it together while cooking. "Skew" is a different verb that means to distort or slant something. So, in the context of cooking, you would use "skewer."