Also found in: Thesaurus, Idioms.
1. Covert intelligence operations designed to disrupt the economy or upset the political situation in another country.
2. Unethical behavior, especially acts undertaken to destroy the credibility or reputation of an opponent.
3. Commercial espionage.
dirty trickster n.
1. unethical or illegal activities directed against political opponents, esp. during a campaign.
2. the covert activities of an intelligence agency.