A Micky is a term from the 1st half of the 20th century used to describe a roofie, or a drug that is used to make someone black out in order to take advantage of them.
George Costanzaconvinced Elaine Bennis to be his honeypot so she could slip his former boss a Micky to exact revenge for George being fired without him remembering.
"Thinking with your Micky" Irish slang for penis is a term that refers to the idea of making decisions based solely on sexual desires and impulses. Thinking with your Micky.