Que pasa loco que comes from everyday Spanish slang, where que pasa is a common informal greeting and loco is a playful way to address a friend, similar to dude or man. Short Spanish phrases like this circulate widely as WhatsApp audios and soundboard clips because they are instantly recognizable across Spanish-speaking communities. The clip's brevity helped it spread in edits, gaming chats and social videos, where a familiar greeting can be reused in countless contexts without needing any setup or explanation for the audience.