NY- A BROWN-haired beauty who claims she had an unsatisfying one-night stand with Keith Olbermann is getting her sweet revenge – she’s launched a blog to warn other women about the acerbic MSNBC commentator’s boorish bedroom habits.

The bitter babe, who calls herself KarmaBites1, says she doesn’t want others “to fall into the same trap . . . and I want him to feel some remorse for what he’s done . . . He sets his mind on a woman, lures her in, and once he gets what he wants, he refuses to ever speak to them again. And I don’t think he understands the damage he’s caused.”

A 30-something office worker of Caribbean descent, KarmaBites1 said she struck up an e-mail friendship with Olbermann, whom she admired, and agreed to fly to New York to meet him last May. She says he came to her hotel room and opened a bottle of Merlot which he “spilled all over.” Then, when “sexual activity began [in] less than an hour,” Olbermann had difficulty. “I pretended he knew what he was doing,” the embittered blogger writes. “I adored the guy. I didn’t want him to think he was a dud in bed,” so she faked experiencing ecstasy.

Next, he piled on excuses as to why he had to leave. “He told me he’s an insomniac and that it’s hard for him not to sleep in his own bed. He also mentioned he hadn’t had ‘company’ in a while. [He said] he had an early meeting with the Yankees [and] he might be allergic to the pillows in the hotel bed.”

Six days later, she claims, Olbermann e-mailed her to tell her never to contact him again. “I practically begged him to explain what I did wrong. I told him I deserved some kind of explanation for such a dismissal, but I never heard from him again.” She said she’s since heard from six other women who say they had brief sexual relationships with Olbermann.

She named her blog forthisreliefmuchthanks.blogspot.com, after a line from “Hamlet” she says the perennial bachelor quoted.

Olbermann’s spokeswoman said she’d get back to us, but didn’t.