Spirit Airlines' 'No Hoax Here!' Airfare Sale

The edgy marketing department at Spirit Airlines is at it again, making obvious reference in a new airfare sale to the confusing girlfriend hoax plaguing Notre Dame football star Manti Te'o.

"There's no hoax here ... Spirit's fares REALLY are low," reads the intro to the airfare sale on Spirit's website. "So, if your girlfriend is around (and real), plan that trip that you've been talking about without paying too much for it. And tell those high fares to RIP!," it continues.

(Read More: Spirit Airlines Raising Carry-On Bag Fee to $100)

Sale fares under the promotion start at $19.90 one-way for members of Spirit's $9 Fare Club, an annual membership program boasting exclusive deals. A limited number of dates and routes are available under the promotion. Act fast, though, if you're interested — the sale ends tonight at midnight. (Click here for the full list of fares and destinations.)

Spirit's previous kitschy ad poked fun at Republican presidential candidate Mitt Romney's "binders full of women" remark at a debate.

(Read More: Spirit Airlines Offers 'Binders' of Airfare Sales)

Before that, Spirit targeted American Airlines' woes with loose seats on its Boeing 757 fleet. They ran a sale offering 7.57 percent off fares promoting it as, "We let fares loose, not seats!"

(Read More: More Loose American Airlines Seats Found )

Misty Pinson, Spirit's director of corporate communication told CNBC.com in an email several months ago that these edgy promotions are not created by outside marketing firms. The process "tends to be a group effort … albeit a small group," she said.

Clever or crossing a line, you be the judge.