Lamar wanted to vent to TMZ about the story we broke -- that, according to witnesses, he shocked Khloe outside a SoulCycle ... jumping out of a car and demanding to talk to her. Khloe eventually ran away after a witness threatened to call cops.
But an enraged Lamar went off ... denying he stalked her, touched her or ambushed her -- and in a powerful rant says the meeting was actually prearranged with Khloe. He's hurt that she's not standing up for him. Even further, he threatens to spill secrets -- whose, he doesn't say -- if something like this happens again.
In the video, Odom goes between anger and sadness -- especially when opening up about how his life has spiraled out of control. He also rips TMZ for what he calls racist reporting about celebrity beefs.