The interesting part is that it's apparently embraced by the brand itself. Back when we had real McDonald's in Russia*, its colloquial name was "makdak" or simply "mak", but it was that — how people called it (and still do). Never recognized officially.

* the corporate pulled out of Russia several months ago and the business was sold to the biggest franchisee. The new owner reopened the stores under a different brand name but kept most of everything else.