Can be used as 'goodbye' or 'later'.
Short for "One Love"

"Goodbye"

Shortened form of "One Love"

n. The loneliest number.

means goodbye, spoken as a true gangsta

another word for 'peace'

l33tsp33k replacement for the exclamation mark. Originates to the common typo in which a "1" is typed instead of an exclamation mark, as a result of the shift key not being held down. This evolved into the current derivative where the term "one" is fully typed.

To close out a meeting, dialogue or some instance of communication with another/others by equating this term with "take care."