"You just listen to what I said. I want to play Mickey the Boob."
"It's good to play Mickey the Boob with you."
from Money Talks (1972, US) (IMDB, by/with Funt the creator of Candid Camera docucomedy/docutragedy/documentary) talking to Dominick a knife dealer, from on Amazon Prime with a/my EPIX Channel free trial.
The major search engines Google, Bing, and Yahoo do not have any definitional information in English, even though it's been 50 years.
Speaking as an American born American citizen American English speaker (said in as single breath/string like many presidents at a debate would) with an exactly 3.69 GPA High School Diploma, and a year of University (like Mark Zuckerberg), who had both parents speaking legal and engineering English 100% of the time, my best/educated guess is that "Mickey" is the male Mickey Mouse and "Boob" is obviously the female human part, which is then confusing the process because of the male/female dichotomy differentials (which could be the meaning is pejorative and condescending maybe a curse word too?), so the meaning is difficult to define by ear.