Hiss may refer to: An onomatopoeia for a type of noise comparable to white noise, such as the release of air brakes. Tape hiss, high frequency noise present on analogue magnetic tape recordings Electronic circuit hiss, white noise present at low level in all electronic circuits In people: Alger Hiss, a U.S. State Department employee and alleged spy for the Soviet Union Donald Hiss, younger brother of Alger Hiss King Hiss, the villainous king of the Snake Men in Mattel toyline Masters of t… (More on Hiss)