Sussy baka combines sus, the shortened form of suspicious that spread through the game Among Us, with baka, a Japanese word for fool often heard in anime. The pairing became a popular meme sound on TikTok and in gaming clips around 2021, repeated, pitched and stretched for comic effect. This longer baaakaaa version leans into that exaggeration, and the phrase is still used online whenever someone wants to tease a friend, mock a bad lie or turn a small suspicion into a joke.