(TMZ) DO NOT Photoshop Megan Fox's face on another woman's body ... and then publish it online ... because she will sue you -- at least that's the threat she sent to one website this week.Megan's legal team fired off the cease and desist letter to a parody website called Celebrity Jihad -- after the site published a shockingly good Photoshopped picture last week, depicting Megan's face on a naked woman's body.
But Megan's lawyers aren't impressed with the image-doctoring skills -- claiming the photo is 100% fake and must be taken down ASAP ... or they'll sue. Read the site's sarcastic response.