Place it at the exact point where the thank you should happen in your edit, preceded by a confused reaction like the Bruh Soundboard Button and followed by a plain Meme Instant Sound Button hit to close the bit cleanly for viewers.
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This is a four-second voice clip of someone saying the phrase 'arigatou chico linguiça' out loud, mixing Japanese for thank you with a random Portuguese name and food word. The clash makes it feel absurd and playful, like an inside joke delivered completely straight, which is why listeners treat the line itself as the punchline.