that phrase is from an old Sega game that was poorly translated from Japanese to English.
You can read more about it here: http://en.wikipedia.org/wiki/All_your_b … long_to_us
I especially suggest watching the videos that people have made. They’re quite funny! 
SOMEBODY SET UP US THE BOMB!
ALL YOUR BASE ARE BELONG TO US!
YOU HAVE NO CHANCE TO SURVIVE MAKE YOUR TIME!!