Sussy baka blends two pieces of internet slang: sus, short for suspicious and popularised by the social deduction game Among Us, and baka, the Japanese word for fool that anime fans already knew well. The combined phrase took off on TikTok and in short-form edits, where creators used it as a lighthearted insult for someone acting shady or silly. Its appeal comes from that crossover, letting gaming and anime audiences share the same joke, and it remains a handy reaction sound for suspicious moments.