‏@JODYHiGHROLLER on twitter

In this day and age of super-connectivity, social media etiquette is officially "a thing." Don't tag a friend in your photo if they look bloated in that bathing suit, don't chronically complain in your status updates, and, according to Riff Raff, don't crop someone out of a star-studded pic.

Going to the VMAs as Katy Perry's date should have secured the rapper a spot in any photo with the pop star, right? A day after the show, Sam Smith uploaded a snap to Instagram, writing, "So amazing to see my girl Charli XCX last night!" with an audience shot of the two British singers, Katy and Riff Raff almost completely cropped out save for his knee.

The "This Is How We Do" rapper slammed Sam with a tweet (above), writing in all caps (except for the letter "I"), "THANKS FOR CUTTiNG ME OUT OF THE PiCTURE U CHUBBY LiTTLE F-CK FACTORY." He made sure to add, "P.S. YOUR FACE iS SUPER HUGE" for a message that appeared on his 1.06 million followers' feeds. 

See the picture in question below.

@samsmithworld on instagram

It should be noted that in another Instagram shot from the ceremony, Sam actually cut Charli in half to include the Riffster. 

Sam, Katy nor Charli have weighed in on the great cropping debate of 2014 yet. Stay tuned.