(transitive, fandom slang) To mark (a document or message) with a spoiler warning, to prevent readers from accidentally learning details they would prefer not to know.

One who spoils; a plunderer; a pillager; a robber; a despoiler. / One who corrupts, mars, or renders useless.

simple past tense and past participle of spoiler

Fitted with a spoiler (of a specified kind).

plural of spoiler

Third-person singular simple present indicative form of spoiler

present participle of spoiler

Blank lines inserted into a message posted on the Internet so that the reader can choose whether or not to scroll down and read a spoiler.

plural of spoiler effect

(voting theory) the effect a minor party candidate with little chance of winning has upon a close election, when that candidate's presence in the election draws votes from a candidate similar to them, thereby causing a candidate dissimilar to them to win the election.