Speed datin’ cougarette TAYLOR SWIFT and high schooler CONOR KENNEDY say sayonara to their whirlwind-ed courtship.

After getting Kennedy clan matriarch ETHEL KENNEDY’s blessing Swift ,22,  hooked up with Conor, 18, at the Hyannisport family compound.

Conor was recently rocked by the suicide of his mother Mary Richardson Kennedy who was in the midst of being divorced from dad Robert F. Kennedy, Jr.  

A friend close to the couple said "it's been over a month since they've even seen each other. With her promotion for 'Red', she has no time off until the end of the year."

Swift, who's obsessed with turning her PR-fueled love life/ heartbreak into Grammy winning chartbusters, has been involved (albeit ever so briefly) with the likes of  John Mayer, Jake Gyllenhaal, Joe Jonas, Taylor Lautner and Cory Monteith, noted.

We guess when it's time to drop a new LP, she'll have split with yet another BF.

Get a new angle, Taylor.