Me pase po comes from everyday Spanish slang, with po used as a casual filler common in Chilean speech, giving the phrase a relaxed, voice-note feel. The exact original recording and speaker are not widely documented, so its spread is best understood through short-form editing culture. Clips this short travel easily between chats, reaction videos and meme compilations, where a familiar spoken line can do the work of a caption. It stays useful because the delivery suggests embarrassment and self-awareness in under two seconds, fitting many unrelated situations without explanation.