This Is the One Word You Can't Say on a Cruise Ship, According to a Passenger Who Accidentally Said It

Nine-month cruise passenger and TikTok star Marc Sebastian says he learned it the hard way after he shocked his fellow sailors

Viral TikToker Marc Sebastian is sharing the number one rule he learned during his time on Royal Caribbean's nine-month cruise.

The social media star — who's been sharing his experiences on the Utlimate World Cruise for the past 18 nights — said using the word “Titanic” is a big no-no on a cruise ship after a mishap he had in mentioning it to fellow passengers.

“Who knew that? I didn’t,” Sebastian said in a new clip posted Monday which showed him reciting a “list of things I’ve learned about cruising” in his room.

With a pen and notebook in hand, he explained, “I brought it up to an entire room of people having lunch that our ship is only 100 feet longer than the Titanic — when I tell you that utensils dropped. Waiters gasped. It’s dead silent.”

Related: TikToker on 9-Month World Cruise Says ‘I Hate It Here’ Amid Canceled Excursions, Hate from Other Passengers

After making the blunder, Sebastian said that his cruise ship friend Nadine whispered to him, "You’re not allowed to talk about the Titanic.”

“Well, it wasn’t like that was in the f---ing handbook,” he noted.

The social media star has been having a drama-filled journey. He set sail on the Royal Caribbean cruise on Dec. 10 for one leg lasting 18 nights. Atria Books sponsored his trip after he mentioned wanting to experience the cruise on his Tiktok. His videos covering the trip have racked up over 600,000 views each on average, with some clips totaling over 2 million.

Among his misadventures were getting kicked out of the "Pinnacle" members' lounge by security during a livestream after a viewer reported him to the crew in real time, stealing a piece of ice from an Antarctic iceberg that was brought aboard the ship, and getting involved in beefs with several elite passengers. In one of his final dispatches from the ship before disembarking, he likened the Serenade of the Seas to "a floating retirement home with a Cheesecake Factory attached."

His leg of the voyage was particularly disappointing as nearly every planned excursion, including to the Falkland Islands and Punta Arenas, Chile, was canceled at the last minute do to rough weather and high winds. Sebastian did achieve his goal of visiting a penguin colony, however.

Related: 9-Month Cruise Passenger Is 'Praying for the Best' as Ship Approaches Treacherous Drake Passage (Exclusive)

He also shared in his recent video a few more things that he learned about cruising during his stay, including that he learned that “cruise ships have godmothers.” He then revealed that the godmother of the cruise ship he’s on is Whoopi Goldberg as a shot panned to a plaque of the actress on a wall.

“Someone get Whoopi on the line girl I have some goss for her,” Sebastian joked in the caption.Lastly, Sebastian revealed that “cruise ships fill their swimming pools with seawater.”

“I don’t know how in my head I thought they were filling them, but what I didn’t think they were doing was filling it with seawater,” he said.

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The lengthy vacation — which has a ticket price range from $53,999 to $117,599 per person — is set to last for 274 nights, visiting 11 world wonders and over 60 countries covering the Americas, Asia Pacific, Middle East and Mediterranean and Europe, before concluding on Sept. 10, 2024.

After rumors swirled on board earlier this month that the cruise could be cut short because of dangerous conditions in the Red Sea and Suez Canal, where it's scheduled to visit in May, Royal Caribbean shared a statement with PEOPLE.

The statement reads, in part: "This adventure will complete its first segment in February, and we can’t wait to kick off the next part of the journey shortly after and begin exploring Asia."

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