OnlyFans model Courtney Clenneyhurled a racial slur at her boyfriend mid-argument … and her parents say she did it to get now-deceased boyfriend Christian Obumseli to leave.

We spoke to Courtney’s parents, Deborah and Kim Clenney, for a new ‘360Aproko Investigates’ airing Monday at 9 PM ET/8 Central on FOX … when the question of a slur Courtney used during an argument with Christian came up.

As we previously reported … Christian secretly recorded Courtney calling him the n-word repeatedly during a fight months before she killed him in the Miami condo where they lived together.

The audio’s brutal to hear … and also explainable according to CC’s parents — who are now facing criminal charges for allegedly illegally accessing Christian’s computer after he was killed.

We spoke to them before the arrest — they have never spoken publicly before — and they told us Courtney said she needed to use such a horrible slur because she was trying to get Christian to leave, with her mom Deborah claiming Courtney said no “self-respecting Black man would stick around after being called that name.”

Deborah went on to say Courtney liked Christian partly because he was Black … and she doesn’t think their daughter would have been prosecuted if she were Black or if Christian were white.

Clenney pled not guilty to second-degree murder after stabbing her boyfriend in the chest … her parents tell us she will plead self-defense.

“360AprokoInvestigates: Killer OnlyFans Model: Deadly Love Story” airs Monday 9/8c on FOX.