What Does the ‘X’ Mean in ‘Xmas’?

We've all seen "Xmas" used for "Christmas," but what does the "X" in that word stand for? Give it your best shot.

1. Generation X

2. Excelsis deo

3. Greek letter "chi"

4. Nothing, it's a shortcut

The correct answer is the Greek letter chi, the first letter in “Christos,” Greek for “Christ.” Although frowned upon as sloppy or profane, Xmas has a long and legitimate history as an abbreviation dating back to the 16th century.