The phrase in the title translates roughly as the leaves are tasty, and the clip circulates online under its Japanese wording and romanised spellings. Its exact source is not widely documented, so it has spread mainly as a standalone reaction sound shared between creators who understand the joke from the tone alone. Short Japanese voice lines like this travel well in edits and streams because the emotion is clear even without subtitles, and this one keeps getting reused for eating, gardening and pet clips where mock delight is the point.