What Is This was an American rock band that originated in Fairfax High School in Los Angeles, California. Formed by guitarist Hillel Slovak, drummer Jack Irons, vocalist Alain Johannes, and bassist Todd Strassman, the band served as the nucleus for the Red Hot Chili Peppers. Members of the band would go on to perform with Eleven, Chris Cornell, Pearl Jam, Mark Lanegan, Them Crooked Vultures, Alain Johannes Trio and Queens of the Stone Age.

Fairfax High School is a Los Angeles Unified School District high school located in Los Angeles, California, near the border of West Hollywood in the Fairfax District. The school is located on a 24.2-acre (98,000 m2) campus at the intersection of Fairfax Avenue and Melrose Avenue.