High Quality Content by WIKIPEDIA articles! A stalking horse is a figure that tests a concept with someone or mounts a challenge against someone on behalf of an anonymous third party. If the idea proves viable or popular, the anonymous figure can then declare its interest and advance the concept with little risk of failure. If the concept fails, the anonymous party will not be tainted by association with the failed concept and can either drop the idea completely or bide its time and wait until a better moment for launching an attack.