The phrase comes from Brazilian Portuguese internet humour, where sabe de nada is a familiar way of saying someone knows nothing, and inocente adds a mock-innocent twist. Short spoken clips like this spread through messaging groups, meme pages and short-form video edits, where a recognisable voice line can carry a whole joke without explanation. Its appeal is the mix of sarcasm and playfulness, which fits reaction videos, pranks and everyday funny moments. Because the line is short and easy to quote, creators keep reusing it whenever a denial looks a little too innocent.