Former NFL superstar Larry Johnson threatened a hotel security guard who responded to a domestic violence incident -- telling the guy, "I'll rip your f*cking vocal cords out" ... this according to the police report obtained by TMZ.
According to the report, the alleged victim identifies herself as Johnson's ex-girlfriend -- and told police LJ beat the crap out of her and strangled her until she blacked out early Friday morning inside of a room at the Bellagio Hotel.
The GF told police ... while Johnson was strangling her, she told him, "If you are going to kill me squeeze harder and just do it."
The GF says she then blacked out and lost consciousness.
As for why he attacked her in the first place, the woman told police she and Johnson had been partying and drinking together when they went up to his room to "catch up." But the GF claims LJ became enraged when they started talking about his daughter. She claims LJ snapped and began to "beat her and throw her around the room" and eventually choked her out.
According to the report, the GF told police she regained consciousness in a hotel hallway while dressed only in her underwear and a see-through blouse. The GF says she banged on doors until someone called for help.
Cops say the GF claims Johnson had attacked her multiple times in the past ... including a recent incident at the Wynn Hotel in Vegas.
According to the report, security quickly made contact with Johnson and brought him to the security office.
One of the security guards told police ... while he was in the office, Johnson bragged about being released from charges "last time" ... and then told one of the guards that he was going to "rip your f*cking vocal cords out."
According to the report, officers say the GF had multiple marks on her face and neck ... and Johnson had a small cut on his cheek and one on his lip.
LJ was eventually arrested for battery with strangulation. He is still in custody and is scheduled to be released at 5pm.