dirty tricks

Definition of Dirty Tricks in English :

1. dirty tricks

underhand commercial or political behavior designed to discredit an opponent

WordNet Lexical Database for English. Princeton University. 2010.

Dirty Tricks

plural noun

1.

underhand activities and machinations in political or governmental affairs, usually intended to discredit an opponent

2.

clandestine operations by undercover military personnel or spies to disrupt a country, assassinate people, influence government decisions etc

3. business

underhand activities involving industrial espionage etc

modifier

4.

involving clandestine, underhand and espionage operations

He claimed he was the victim of a dirty tricks campaign.

He thought the dirty tricks department should be able to come up with something better than poisoned suntan lotion.

Informal

unethical or illegal tactics, specif., such tactics used to discredit, harass, etc. one's political opponents

pl.n.
Informal

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.