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1.
One who tweets via twitter while at the wheel of a motor vehicle or while operating heavy machinery. This, more often than not, results in serious injury and/or death.
Passenger: "Look at that asshole tweeler, cut him off."
Driver: "I'll give you something to tweet about emo fag!"

Wade is such a tweeler. I am surprised he has only impaled three people with his forklift today.
by SamSchlong October 20, 2009