The phrase is everyday Brazilian Portuguese slang for giving up on understanding something, similar to saying who knows or go figure in English. Clips built around short spoken reactions like this spread through WhatsApp groups and meme edits, where a single line can be reused out of context. Because the wording is so ordinary, viewers instantly get the joke even without knowing where the recording came from, and editors keep it for moments that are random, contradictory or just impossible to explain logically.