adj. Preoccupied by reading or sending text messages, particularly while driving a car.
Other Forms
The usual concerns arise, knowing teen drivers will be packing the ever-present buzzing and ringing cell phones from which most seem incapable of parting. We've had the discussion many times at our house of the idiocy of driving while using a cell phone and especially driving while "intexticated," and as confident as I am that my kid won't do it, there's always that nagging concern that the slightest distraction can lead to tragic consequences.
—Lorrie Lykins, “Parents, teens need safe driving contract,” St. Petersburg Times, May 31, 2009
A British study has found that ''intexticated'' drivers are worse than intoxicated ones, and even as dangerous as those who do drugs and drive.

Nearly 50 percent of the drivers ages 18 to 24 surveyed said that they sent text messages while driving, according to the study by Britain's Royal Automobile Club.
—Ginny MacDonald, “Texting while driving worse than drunken driving, British study finds,” Birmingham News, March 30, 2009
2007 (earliest)
Aronson isn't alone when it comes to teenage drivers who text message while driving. In a recent informal Fox news survey done in Minneapolis, a large majority of the 161 teens interviewed admitted to "driving while intexticated."

Eighty-six percent of teens surveyed said they read incoming messages while in the driver's seat, and 75 percent said they typed them. On a driving course, cameras recorded some teens taking their eyes off the road for three seconds to text.
—April Dembosky, “Driving while intexticated,” The Patriot Ledger, July 14, 2007
More than 15 million drunken text messages will be sent by inebriated Britons every day in December, according to new research.

"Intexticating", the habit of sending inappropriate messages on mobiles while drunk, affects one in four Brits.
—Emma Britton, “Intexticated,” The Mirror, December 22, 2003