Meghan McCain regrets posting risque twitpic

All Meghan McCain wanted to do was curl up at home with a book.

But Wednesday, when she snapped a photo of herself smiling slyly in a low-cut, cleavage-bearing tank top (and holding up the book) and posted it to her Twitter account -- writing "my 'spontaneous' night in" -- her cozy plans went sour.

The DailyBeast.com columnist and daughter of Republican Senator and presidential candidate John McCain proceeded to field tweets critical of her self-portrait. One Twitter user joked "WOW! I smell playmate of the year 2010?!?!"

"So I took a fun picture not thinking anything about what I was wearing but apparently anything other than a pantsuit I am a slut," McCain, 24, wrote.

As the night wore on, she considered deleting her Twitter account like Miley Cyrus: "I am going to take some more time to think about it but seriously I was just trying to be funny with the book and that I'm a dork staying in."

Next, she emotionally explained her at-home wardrobe choices: "when I am alone in my apartment, I wear tank tops and sweat pants, I had no idea this makes me a 'slut', I can't even tell you how hurt I am."

Before signing off for the night, she wrote, "ok I am getting the f*** off twitter, promise not to delete my account until I sleep on it, thank you for the nice words supporters . . . I do want to apologize to anyone that was offended by my twitpic, I have clearly made a huge mistake and am sorry 2 those that are offended."

This afternoon, Tweets of support (and mockery) rolled in for the young Republican. Wrote one fan: "[you're] smart, funny and very attractive. don't let this BS bother you! Keep you're chin up. I can't believe people r offended"

Countered a detractor: "There's a reason they're called 'TwitPics' you know.. [Meghan McCain] is NOT a VICTIM."