X is also used as a
substitute for the most things that sounds similar to "cross." This is because the representation of the letter X looks like two sticks crossing each other's path. This
abbreviation is commonplace as it is easier than writing the whole 4-5 letter "cross." (It does not speak well for the human race that we don't even have time to write "cross" down). Examples include:
-
Xmas (Christmas)
-
Xing (Crossing )
- Xover (Crossover)