1. a drink, typically alcoholic, that has been secretly drugged or tampered with
Usage: informal; often used in the phrase 'slip someone a micky'
2. a Mickey Mouse; something trivial, insignificant, or of poor quality
Usage: informal; often capitalized as 'Mickey'

Examples

• He suspected someone had slipped him a micky at the bar.
• That course is a micky—it requires almost no work.
• Don't take that job offer seriously; it's a micky position with no real responsibilities.
• She woke up confused, realizing her drink had been spiked with a micky.
• The company's new policy is a complete micky; nobody respects it.