An abbreviated way of expressing that a phone number can be used for both calling and texting. When added after a phone number this expresses permission for the person receiving the number to contact the phone owner in either manner, but more than likely a text message is preferred.
Person 1: Let's study together later.
Person 2: Well, write down number and we can set something up, I'm not sure what my schedule is right now...
Chinatown, an urban area of downtown Manhattan that is heavily oriental-influenced. You can see a lot of the teenagers there (especially from xanga) talking of this place.
Excerpted from a xanga:
holla` tuhdei i went tu c.t. wif mah frenn`s & chilled .. went tu seymour & met ups wif kitty mui mui ...