A small bottle of liquor, holding 375 ml or 13 oz., typically shaped to fit in one's pocket.
"The bartender slipped me a mickey before I even sat down at the bar."
A Mickey Finn; a beverage, usually alcoholic, that has been drugged.
In plain English: A mickey is an old-fashioned term for a large glass bottle used to hold alcohol.
"The children ran to Mickey for help when they got lost in the park."
Usage: Use the noun form "mickey" when referring specifically to a small, portable bottle of alcohol that fits in a pocket. As a verb, it describes the act of surreptitiously adding drugs or other substances to someone's beverage without their knowledge.
To secretly slip drugs into somebody's drink.
"The bartender was arrested after it was discovered that he had been macking drinks at the club to make customers pass out."
In plain English: To mickey someone means to trick them by pretending you are going somewhere but actually staying put so they waste time looking for you.
"The toddler mickeyed his friends by pretending to be invisible and hiding behind their backs."
A diminutive of the male given names Michael, Mike or Mick.
"After years apart, Mickey finally reunited with his old friends from college under their original names."
The word "mickey" is simply an alternative capitalization of the name Mickey, which originated as a diminutive form of Michael. While the name itself has long been used to refer to the famous cartoon character, the term also acquired slang meanings for other concepts like small distances or body parts over time.