spoiler party

American  

noun

U.S. Politics.

1. a third political party formed to draw votes away from one of the two major parties, thus spoiling its chance of winning an election.

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Etymology

Origin of spoiler party

First recorded in 1965–70

Example Sentences

Fuehrer said he hopes his party can regain its footing and grow to be more than a “mini-major” and spoiler party by pulling in new supporters like Anderson and Horner.

From Seattle Times

Beware: I’m unafraid to host a big spoiler party—a novel that can be truly “spoiled” by the summary of its plot is a novel that was already spoiled by that plot.

From The New Yorker