Corey Gamble claims he overheard Blac Chyna threaten to kill Rob Kardashian on numerous occasions on the night of their epic brawl… once over the phone and once in person.

For the first time in Chyna’s trial, Corey was put to the stand on Tuesday, presenting his account of the allegedly violent brawl.

CG, who testified in front of the jury Kris Jenner, Rob’s life partner, testified that he was aroused that night by an incoming call from Rob to Kris… and that when Kris put the call on speaker, he heard Chyna shouting over Rob in the background.

Corey claims he overheard Chyna tell Rob… “F*** you, you fat mother f*****, I’m going to murder you.”

Corey claims he sprang out of bed, hurriedly changed, and rushed over to Kylie Jenner’s house, only a few blocks away, where Rob and Chyna were staying, since he saw it as an explosive situation.

Corey claims he parked behind Rob’s car and went to the unlocked front door. While Corey went alone, Corey claims Kris also wanted to go, but Corey persuaded her to stay back because the scenario was potentially deadly.

Corey claims he overheard Chyna yelling angrily at Rob at the front door, telling him she despised him and threatening to “murder him.”

Corey said that while inside, he noticed Chyna around 7 feet away from Rob, clutching a huge rod in her hand that she dropped when she saw Corey.

Corey said that Chyna then raced towards Rob and grabbed a lengthy phone charging cord, whipping him and punching him on the shoulder.

Corey claims he jumped between them to separate them and was struck in the process. He testified to the jury that he advised Rob to “get the heck outta here” because he thought the situation was unsafe, and that Chyna smelled like she had been drinking.

CG claims Chyna chased after Rob as he attempted to flee, telling the jury she was enraged and wanted to continue attacking, but Corey claims he stopped her and even tried to hide her keys.

Corey claims he walked outside to reposition his whip after realizing he had blocked in Rob’s car with his own… but when he did, Chyna leapt back on Rob and kept punching him, landing blows to Rob’s head.

Corey claims Chyna then grabbed a nearby patio chair and flung it at Rob’s car, damaging the front, before attempting to grab a small table and toss it as well… but Corey claims he stopped her.

Chyna previously testified that she did not throw anything at Rob’s car and that she did not threaten or hit him.