spoiler (Noun) — A candidate with no chance of winning but who may draw enough votes to prevent one of the leading candidates from winning.
spoiler (Noun) — Someone who takes spoils or plunder (as in war).
spoiler (Noun) — Someone who pampers or spoils by excessive indulgence.
spoiler (Noun) — An airfoil mounted on the rear of a car to reduce lift at high speeds.
spoiler (Noun) — A hinged airfoil on the upper surface of an aircraft wing that is raised to reduce lift and increase drag.
spoiler (Noun) — A description of a story, movie, etc, that reveals key elements of the plot and hence may spoil the suspense and enjoyment of someone who does not already know what happens.