spoiler

(noun) a candidate with no chance of winning but who may draw enough votes to prevent one of the leading candidates from winning.

(noun) someone who takes spoils or plunder (as in war). Synonyms: plunderer, pillager, looter, despoiler, raider, freebooter.

(noun) someone who pampers or spoils by excessive indulgence. Synonyms: pamperer, coddler, mollycoddler.

(noun) an airfoil mounted on the rear of a car to reduce lift at high speeds.

(noun) a hinged airfoil on the upper surface of an aircraft wing that is raised to reduce lift and increase drag.