To get a lucky qualification for something.
"John got such a mickey mouse qual for the wrestling state finals, he's so lucky."
Where Mickey and his friends eat people.
Mickey Mouse Steakhouse, come inside we'll eat you alive.
Getting an HJ on the space mountain roller coaster
Ryan got a sideways Mickey Mouse yesterday
A baseball ballparks where it is easier than usual to be able to hit a home run due to things such as walls being closer than most other parks.
Man Yankees Stadium is such a Mickey Mouse Park, players are always hitting home runs at the short porch.
A war that achieved nothing, was pointless, or was not worth the lives lost.
Vietnam was a Mickey Mouse War.
A word used to define moments of pure confusion and ignorance
"Hey Jack, Peter's mother died of cancer!"
"That's a mickey mouse moment right there!"