The phrase comes from Brazilian internet gaming slang, where calling something a hack is a common joking accusation when a play looks too good to be fair. Olha que hack roughly means look at that hack, and the drawn out cansooo ending adds tired, exasperated humour. Clips like this spread through soundboards, group chats and short video edits because the wording is easy to reuse out of context. It stays popular as a light hearted reaction for cheating jokes, skill highlights and moments that feel rigged.