A Spy's Favourite Way To Give Presents...
Quizzes & Puzzles0 min ago
No best answer has yet been selected by MORELLO. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.When I first saw the film I just assumed it was actually Muscle (singular). Some time after that I read a review and it said it stood for Muscles. Having just googled, it would appear it could be either:
Wikipedia