Abbreviation for 2010, based on Roman numerals.
When you are so over the two thousand and nines and twenty tens it is time for 2MX!
The year '2010' in Roman numerals. 'M' stands for 1000, and 'X' stands for 10. 'K' stands for 1000, but it isn't Roman numerals, it's metric, like kilo-.
Happy 2MX everyone!