Definition of "tweetup" [tweetup]

• A real-life meeting organised on the social networking web site Twitter. (noun)

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• "Even though this tweetup is by invitation only, if you are heading down to the Airshow this Friday from 3.30 – 5. 00pm (which means you have an Airshow trade pass), be sure to pop by the tweetup venue."
• "But yes, calling it a tweetup is a bit off I think."
• "But after that there's a get together downtown (aka tweetup)."