t'whittle

v. to edit a finished Tweet or SMS text message with the goal of reducing the content to 140 characters or less.

cont.: "text" and "whittle".

1. Conversational:

Bill: Are you still sending that text message? What's taking so long?
Sam: I have to t'whittle it.

2. The message:

Good Morning! I saw you last night but didn't get a chance to say "Hi!" I hope your trip was successful and that you'll be joining us this Saturday at Phil and Jenny's place after the kids finish their rehearsal.

is t'whittled to become:

G'morning! Saw you last night from afar, hope your trip was good. We're @ Phil and Jenny's this Sat. after rehearsal, you?