Elon Musk and Mark Zuckerberg's feud is so embarrassing

• Elon Musk and Mark Zuckerberg are at it again.

• Zuckerberg has been mocking Musk on Threads, and Musk responded by calling Zuckerberg a "cuck" and proposing a "dick measuring contest."

• Insider reached out to Twitter and Meta for comment. Twitter responded with a poop emoji.

Twitter executive chairman — and self-appointed "Chief Twit" — Elon Musk and Meta CEO Mark Zuckerberg are at it again.

The two men's ongoing internet feud reached embarrassing heights over the weekend, with Zuckerberg mocking Musk's style of tweeting on Threads and Musk responding by proposing a "literal dick measuring contest."

Zuckerberg, 39, responded to two users' posts on Threads, which is Meta's Twitter competitor, with the word "concerning," along with a crying laughing emoji. As Insider reported, Musk has replied to tweets with the word "concerning" at least 26 times.

Musk, 52, hit back at Zuckerberg by calling him a "cuck" in response to a tweet featuring a screenshot of an interaction between Zuckerberg and the fast-food chain Wendy's.

"hey @zuck, you should go to space to just really make him mad lol," Wendy's posted on Threads, referring to Musk, who owns SpaceX.

Zuckerberg responded with the crying laughing emoji.

"Zuck is a cuck," Musk tweeted in response to the screenshot. A little over eight hours later, he replied to his own tweet saying, "I propose a literal dick measuring contest," along with the ruler emoji.

The digital war of words comes after Musk challenged Zuckerberg to a "cage match" last month. After confirming with Dana White, the president of the Ultimate Fighting Championship, that Musk was serious about fighting him, Zuckerberg responded by saying, "Send Me Location."

White told The New York Times that the fight would be an exhibition match and that while the details were still being worked out, it would likely take place in Las Vegas.

On June 30, Musk tweeted that there was "some chance fight happens in Colosseum." That came after TMZ reported that an Italian government official had reached out to Zuckerberg about staging the match at the Roman Colosseum.

Italy's Ministry of Culture released a statement following the report, saying that "there has been no formal contact from the ministry, nor any written document," and that if Zuckerberg and Musk want to fight at the Colosseum, "they would have to make a non-violent challenge."

The Times reported that people close to Zuckerberg have been generally supportive of the match and that while Musk dislikes sports and lacks the discipline needed to regularly train, nothing can be ruled out with him.

Musk is also attacking Zuckerberg on the legal front, accusing Threads of copying Twitter and sending a cease-and-desist letter. The letter from Twitter lawyer Alex Spiro alleged that Meta misused Twitter's trade secrets and hired ex-Twitter employees who used proprietary information to design Threads.

Meta communications director Andy Stone told Semafor that Twitter's allegations are meritless, saying that "no one on the Threads engineering team is a former Twitter employee — that's just not a thing."

Insider reached out to Musk, Twitter, Tesla, Meta's press office, and a spokesperson at Meta. Twitter responded with a poop emoji.

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