Farrah Abraham -- Wanna Drive? Get Down and BLOW

Sex tape con artist Farrah Abraham will have to put her best skills to use if she wants to drive in the State of Nebraska ... because she can't start her car without blowing first, TMZ has learned.

We broke the story ... the former "Teen Mom" star was popped for DUI in Omaha after celebrating St. Patrick's Day a little harder than she should have. According to police, she blew a .147 on the breathalyzer ... nearly twice the legal limit.

Farrah has since been ordered to install a "vehicle interlock device" in her car (a breathalyzer thing that prevents your car from starting if you've had something to drink).

Farrah has to use the device until September 29, which is when her normal driving privileges are expected to be reinstated. Call it practice for her next porno.

FYI, Farrah hasn't been convicted yet ... the blowing device is just SOP in Nebraska for anyone arrested for DUI. Her next court date is April 29.

Farrah's fully embracing her new status as permanent DD too ... she just posted this video online, showing off her new device.