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1.
140
The maximum number of characters allowed in a tweet, which is a single message on the Twitter social network.

This 140 character limit has given rise to a twitter-based expression derived from 411. "The 411" being a phrase that means "information," "summary," or "low-down," 140 is the Twitter equivalent. You could say "The 140" is the twitter equivilant of "the Reader's Digest version;" it's the summary or gist of something that can fit within the bounds of a tweet.
Charlie: @Echo Hey, did you hear about that newfangled thing?
Echo: @Charlie No, I didn't. What's the 140?
Charlie: @Echo It's harder better faster stronger!
by RyanMichael June 29, 2009
 
2.
140
A sex act in which an orgy of people make a circle of hand jobs and blowjobs, satisfying everyone at the same time. can also be accomplished with three or more participants. Although, if it is less then 140 participants, its not the 'ole 140, and will be reffered to as the blue 140. If it is more than 140, it is reffered to as "Chuck Norris on a slow day"
Jim:Dude, I heard Sally just 140 with your brother and his freinds
Joe:THAT BASTARD, ill show him, i'll do the Canada's History on his girlfriend.
by CookieGum February 24, 2010