Mickeys meaning : A small bottle of liquor, holding 375 ml or 13 oz., typically shaped to fit in one's pocket. A Mickey Finn; a beverage, usually alcoholic, that has been drugged. American depression era term for a potato as in a "roasted mickey". The penis. The vagina. A well-known honeyeater, the Noisy Miner, Manorina melanocephala, of eastern Australia. (rural Australia) A young bull, especially one that is unbranded and running wild. Piss, shortened and more commonly used form of Mickey Bliss. The resolution of a mouse, used as a unit of length. To secretly slip drugs into somebody's drink.