Back in March, it was said that Mariah the Scientist got into a fight with fellow rapper Cleotrapa, which Cleotrapa denied.

It turns out that she wasn't lying because another woman named Cleopatra Dues was the alleged victim, and she told Fulton County police about the beatdown.

So, Mariah — who's Young Thug's girlfriend — was arrested on Wednesday, May 1, after Dues said she was attacked inside Atlanta's Cavo Kitchen and Cocktail lounge.

In a police report, it says that Mariah ripped off her wig, and dragged her all around, leaving her with injuries to her feet and legs.

Plus, Dues said that she never had a beef with Mariah or her friends and is confused about why she was attacked. 

Mariah — who was charged with simple battery —has already bonded out, and has yet to comment on the arrest.

You can see a video of the assault above.