This short Portuguese phrase circulates online as a reaction sound rather than a line tied to a widely documented film, show or song, and its appeal comes from that flexibility. The repeated question in its original soundboard description, que isso que isso, points to the same confused, what-is-that energy that creators use it for. Shared in meme edits and short-form videos, it works as a quick callout for odd, suspicious or surprising behaviour, and its four-second length makes it easy to reuse without slowing down a fast edit.