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Blueface Robbery Case Allegedly Swiped Fan's Phone ... After Chrisean Beat Her Up

Blueface might not be locked up at the moment, but if the new details about his recent Las Vegas robbery charge are true ... his freedom could be in jeopardy.

According to the police report, obtained by TMZ Hip Hop, Blueface, his pregnant girlfriend Chrisean Rock and several others in their entourage are accused of assaulting a woman ... on May 29 inside the Palms Casino.

Cops say the woman walked up to Chrisean and professed her love for the reality star, and congratulated her on her pregnancy ... but also proclaimed she didn't care for Blueface, and added a "F*** him" for good measure.

According to the report, Chrisean didn't appreciate the verbal jab at her man, and punched the woman in the left side of her face. Cops say Blueface then snatched her phone, put it in his back pocket and mockingly said, "This is mine now."

Officers say the woman was able to retrieve her phone from Blueface, but claims another man in the entourage clocked her with an uppercut!!!

During the melee, Blueface allegedly kicked the woman in the face and chest until security intervened ... and Blue, Chrisean and co. fled in a Dodge Charger.

Responding police officers reviewed hotel surveillance footage, as well as the cell phone footage showing the moment Chrisean hit the woman.

As we reported, Blueface got arrested Wednesday while in court for another, more serious, case -- he's charged with attempted murder for a shooting incident last year outside a Vegas strip club.

He's since posted bail, and interestingly, it wasn't Chrisean who picked him up outside jail ... it was Jaidyn Alexis, the mother of his 2 kids and future gangsta rapper. Allegedly.

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