gnarly

Any kind of intense or dangerous thing, person, or situation; most often applied to waves. Pipeline, Teahupoo, and Shipstern Bluff are among the world's gnarliest breaks. "Gnarly by Nature" was the title of a 1997 Surfing magazine profile on Hawaiian power surfer Sunny Garcia. Also used as a derogatory expression; greasy food at a breakfast café can be described as "gnarly."...