The 32-year-old reality star has been dating Tristan since September (16), with their relationship apparently going from strength to strength.
While Tristan's personal life is going well, his professional life is suffering somewhat - with the Cavaliers losing three straight games in recent weeks.
One Twitter user, @Slimmy97, dared to link Tristan's relationship with Khloe to the team's poor performance on the court, writing: "Cavs haven’t been playing too well since Khloe Kardashian. Just saying.”
But Khloe was quick to hit back at the allegations, launching a foul-mouthed attack on her critic as she tweeted on Monday night (05Dec16): "They are #1 in their conference but thanks 4 (sic) sucking my d**k hard enough 2 think I have that much power. Lick on my b**ls while you're at it."
Their bad run didn't continue into Monday night's game, when the Cavaliers beat the Toronto Raptors 116-112.
This isn't the first time Khloe has been accused of affecting a partner's performance. She was previously married to basketball player Lamar Odom, and while he was a championship player when they met, things slowly unraveled for him and after he and Khloe split, he ended up in a coma after being found unconscious in a brothel in Las Vegas in October, 2015. This has contributed to speculation about a "Kardashian Kurse" - said to affect the men who dating women in the Kardashian family.
Scott Disick, who has three children with Kourtney Kardashian, has been in and out of rehab for his various addiction issues, while Kanye West, married to Kim Kardashian, was recently hospitalized after suffering a breakdown due to exhaustion and sleep deprivation.
Scott recently addressed the curse theory in an episode of Keeping Up With the Kardashians, saying: "I feel like anybody that's dated any girls within her family has gotten some kind of curse."
In a discussion with Kylie Jenner later, Scott said: "You know how everyone says there's that Kardashian curse to the men? It's kind of scary but it's kind of dope if it actually had truth to it."
In her chat to camera, Kylie explained: "The Kardashian curse is every male figure that comes and dates a Kardashian, their life just goes downhill after that."
After discussing his theory with his relatives, Scott went to see a tarot card reader, who told him: "I would probably say you do have a curse."