noun: (Canada) Initialism of employment insurance.
noun: Initialism of extreme ironing. [The humorous extreme sport of ironing in various outdoor places, especially those that are remote or difficult to access. Abbreviation: EI]
noun: Initialism of enhanced interrogation. [(US, politics, euphemistic) The practice of using techniques normally considered torture that are claimed not to be torture according to a carefully parsed interpretation of legal language.]