Fun to say. Less than fun to experience. Haboobs are dust storms known for their distinctive wall-like appearance. Think the ice wall from Game of Thrones, but made of dirt, and heading right for you at speeds as high as 60 miles per hour.
The word is Arabic, but haboobs can happen all over the world. In fact, one of them hit eastern Washington state last weekend.
Image: Hey, Haboob... You suck., a Creative Commons Attribution No-Derivative-Works (2.0) image from nickbastian's photostream