Photo Of Naked, Kim Kardashian-ish Woman Allegedly Posted on Kanye West's Twitter as Prank

A picture of a naked woman scarfing down a meal and looking suspiciously like Kim Kardashian was posted on Twitter last night ... and word circulated Kanye West was the one who originally tweeted it.

We've done our due diligence, and here's what we found. First, the woman in the pic appears to be porn star Amia Miley. Miley tweeted the same photo of herself on her twitter account in 2011, and she tells us it's her. She also says she's never hooked up with Kanye.

Second, although the pic has been sent around with credit to Kanye, we've learned it was never posted on Kanye's account. A source close to Kanye confirms ... he didn't do it.

We're told it's all part of #WanksterWednesday -- a prank day where people try to get bogus rumors started.

Nonetheless ... we likey the pic.

1:24 PM PT: Kanye's rep just emailed us a statement, claiming the pic is NOT Kim K -- saying, "This phantom tweet never occurred on his account. This is obviously the desperate, sad act of someone seeking to gain media exposure by exploiting Kanye’s notoriety."

The rep adds, "Kanye doesn’t even know this person, has never seen this picture, and hasn’t been on his Twitter account for a day.”