The hottest new slang acronym on TikTok is "SDIYBT," thanks to one viral SpongeBob SquarePants meme.

Videos using the acronym and hashtag "#SDIBYT" are popping up on FYPs everywhere, and they all link back to a larger meme trend about "digging in yo butt" that's been going viral for weeks.

So, what does "SDIYBT" mean, and why are memes about digging in your butt going viral? Here's what you need to know.

@sunaisswagg sdiybt :3 #fyp #tiktok #foryoupage #trend #spongebob #sdiybt ♬ original sound – y_tema

What Does 'SDIYBT' Mean?

Between May and July 2025, memes using the catchphrase "digging in yo butt" have been steadily growing on sites like X, Instagram and TikTok. The earliest known example of the meme dates back to 2019, but the format really only took off in 2025.

There's no good, solid reason why they started blowing up so much, and likely took off thanks to one particularly viral post, as is often the case with memes.

Then, on July 4th, TikToker @oe._ytv1 ushered in the next evolution of the meme by posting an edit of a scene from the SpongeBob SquarePants episode "Welcome to the Chum Bucket." In the edit, Plankton asks a robot with SpongeBob's brain to make him a Krabby Patty. Instead, the robot beeps and says, "Start digging in yo butt twin."

@oe.ytv1 start digging in your butt twin 😭✌️#fypシ #xyzbca #spongebob #memes #giftok #funny ♬ original sound – ytema

How Is 'SDIYBT' Used In Memes?

The July 4th, 2025, video by TikToker @oe._ytv1 garnered over 350,000 views in around two weeks and took off midway through the month as TikTokers began lip dubbing to the original sound.

In typical TikTok fashion, the phrase was quickly shortened to the acronym "SDIYBT," which now acts as a hashtag for videos related to the sound and slang term.

As an original sound, "SDIYBT" is being used in funny lip dubs over a variety of captions. Some viral examples use it to represent a friend, coworker or other subject saying something unwarranted and unnecessary in a time when they should really lock in.

@elbappogod9 We are hard stuck in silver #sdiybt #gaming #fyp ♬ original sound – y_tema

What Are Some More 'SDIYBT' Memes?

@datsnotnel Is this valid🤷🏾‍♂️#fyp#spongebob#jjk#cursed#meme#viral#cursedspeechuser ♬ original sound – y_tema

@whatsashithawk Also now you have ads that play because you didn’t get premium. #neuralink #tesler #cat #speakwithanimals ♬ original sound – y_tema

@odawgbiscuit #joke #prank #lol #lovemyjob ♬ original sound – y_tema

@theuraniumskull Start digging to your butt twin. Eggman test Metal Sonic's new upgrades #fyp #drawing #meme #spongebob #fish #sonic #metalsonic #eggman #robotvoice #shock #viral ♬ original sound – y_tema

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For the full history of SDIYBT, be sure to check out Know Your Meme's encyclopedia entry for more information.