One of TikTok's most iconic viral videos is going viral again, and it's all thanks to an engagement bait meme on X.

The viral video is known as "Sucky Tan Ducky Doo," and it's been looping in TikTokers' heads since it first dropped on the platform back in 2021.

But what is the "Sucky Tan Ducky Doo" meme, what does it mean, and where did it come from? Here's what you need to know.

@iheartnanami1 im fluent 😏 #japanese #funny #satire #anime ♬ original sound – walmartbadussy

What Is The 'Sucky Tan Ducky Doo' Meme?

Back in September 2021, young TikToker @r33sq posted a video that would go on to be a major hit on the platform, racking up over 18 million views in four years.

In the video, she plays Roblox while answering questions left on one of her previous videos. One of those questions is, "Is Japanese a hard language?"

The TikToker's answer was what sounded like, "Sucky tan ducky doo," a phrase that seems to be a poorly translated and spoken version of "Sō kiita ndakedo," or "そう聞いたんだけど," meaning "That's what I heard."

This led to many callouts in the comments, with some simply finding the phrase funny and others accusing her of using Google Translate and pretending to be learning Japanese. Since then, the video has become a classic among the app's users.

@r33sq I try to say as much as I can in English 😅😂 #fyp#foryoupage#foryou#viral#like#LetsGetBackOnTrack#follow ♬ Coconut Mall (From "Mario Kart Wii") – Arcade Player

How Is 'Sucky Tan Ducky Doo' Used In Memes?

The "Sucky Tan Ducky Doo" video has been reposted on TikTok numerous times throughout the 2020s, with many of these reposts gaining millions of views. It's often reposted with an added caption about how iconic or memorable the video is.

It's also been uploaded elsewhere online and inspired things like lip dubs, animations and memes that poke fun at the absurdity of the phrase.

Most recently, an engagement bait meme was posted to X by @as__sterr__ that gained over 1.4 million views and 64,000 likes in a single day.

The meme, which was posted in reply to someone who wrote, "Is Japanese a hard language," consists of an image of a kid sucking their thumb, a woman tanning, a rubber ducky and a dew-covered blade of grass. It is meant to be read, "Sucky tan ducky dew."

What Are Some More X Memes?

@mralozai.ipa uhh sucky tan ducky doo #fyp #fypシ #roblox #eidmubarak ♬ original sound – MrAlozai

@squishedantman Sucky tan ducky doo 💓 @maddie #suckytanduckydoo #bluelock #gojo #disney #anime #weeb #cosplay #cosplayer #mha #myheroacademia #bokunoheroacademia #bakugou #deku #todoroki #jujutsukaisen #jjk #cringe #bnha #disneyland #spacemountain #disneyworld #sukuna #yareyaredaze #gambaregambare #baka #uwu #kawaii #sugoi #oioioi #katsukibakugou #bakugoukatsuki #katsuki #kacchan #izukumidoriya #izuku#midoriyaizuku #midoriya #shototodoroki #dabi #shigaraki #japanese #japan ♬ original sound – ellaisrllycool

@1234eeii uhhhhh sucky tan ducky doo #suckytanduckydo🤪 #suckytanduckydoo #fyppppppppppppppppppppppp #fypシ゚viral #fypシ #fypp #fyp #fyppp #floptok #floptok😍😍😭😌🤞💅💅 #r33sq #😭😭😭😭 ♬ original sound – i love cats

@goodnessgraciousmeme Is Japanese a hard language? #fyp ♬ keepingupwithnunu – Clipzir 📸

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