Lindsay Lohan's nip slip in I Know Who Killed Me whetted our appetites for more skindsey from Lindsay, and it seems to have had the same effect on Lilo herself.

Fresh out of jail and rehab and gearing up to portray porn legend Linda Lovelace in Inferno, Lindsay has a role in the Robert Rodriguez grindhouse send-up, Machete, which comes out this Friday.

And according to a nudity-minded spy who saw an early screening, our favorite Hollywood hell-raiser bares more than just a handful of her fine, freckled flesh. The source says:

I saw Machete. It's really well-executed exploitation but Lindsay is barely in it. She's nude almost the whole time (except for the "nun with a gun" scene), and she has a videotaped mnage trois with her mother (not Dina) and Danny Trejo in a pool. Her father pulls her out of a drug den type situation and confesses (to priest Cheech Marin) to lustful thoughts about his daughter. "i just wish she'd look at me as more of a man."

Of course, another tipster also told MrSkin.com that Lindsay was topless, but her hair was "strategically covering her breasts." We won't know until we see it, but considering Lohan's Killed Me stripper nip and willingness to bust out her gravity-defying gazongs in the Lindsay's Private Party shoot for Muse mag, we have no reason to believe that she wouldn't continue to share her hooter harvest with the rest of us.

They say old habits die hard, but with Lindsay, bad habits get us hard... not to mention what happens when she strips off her habit.

We'll have a full report on Lindsay's Machete nudity on Wednesday!