Nick Steven Oliveri is an American multi-instrumentalist, singer and songwriter. He is best known as a former bassist of Kyuss and later Queens of the Stone Age from 1998 to 2004. Oliveri is also a solo artist and frequent contributor to his friends' albums and tours, including Winnebago Deal, Masters of Reality, Turbonegro, Moistboyz, Svetlanas and Big Scenic Nowhere among many others. He is currently the frontman of his project, Mondo Generator, a punk and metal hybrid that he formed in 1997, and the co-founder of the stoner rock power trio, Stöner. He has also worked periodically with the Dwarves since 1993.