A person who dislikes something (generally a creative work, fictional character, or person), but is still interested in it, devoting time to mocking or criticizing it.

fansite.

one of the specially shaped rotating parts (blades) of a mechanical fan which move and distribute air.

Third-person singular simple present indicative form of hit the fan

An electric, oscillating fan supported by an adjustable height, tiltable head, detachable stand.

A propeller which is housed inside a duct to improve engine performance of aircraft.

A modified turbofan engine with the propeller outside the engine duct of an aircraft.

An organization of fans (enthusiasts) of a particular person or body of works.

Alternative form of fanservice

Death supposedly caused by staying overnight in a closed room in which an electric fan is operating. It is a South Korean urban legend.