The Kardahsian sisters were on a holiday in San Francisco when pregnant Khloé took issue with sis Kourtney being on her phone instead of spending time with her and Kim.
During at a sightseeing tour of San Francisco's famed Alcatraz prison, Koko began to sound off about her older sibling's apparent technology addiction.
"What the fuck are you here for?!" Khloe yells at Kourt in an episode teaser for Keeping Up With The Kardashians. "You're like a waste of space in my meter right now."
"I'm looking at everything," Kourtney says.
"You're annoying as fuck now when we're together," Khloe tells her, as middle sister Kim eggs on the lecture. "This is what you do, you're on your phone the whole time. You're just not present."
"I had a 10 minute conversation with Sarah and that's offensive?" Kourt screams.
"Yes, because we're only here once. When are we ever gonna go back to Alcatraz?" Khloe yells back, adding, "fucking bitch."
A fired up Kourt then shouts, "Fuck you, you fucking pregnant whore!"
Sheeeeeesh! Dash sisters bringing the dramaaaaaaaaaa!
The pair mush have made up because Khloe, who is due in April, recently took another trip with her sisters.
This week, while on a "babymoon" in Toyko the 33-year-old hit back at pregnancy shamers who said she was way too OTT with her baby bump.
Go girl! You enjoy!!!