The phrase is everyday Mandarin rather than a line tied to a confirmed film or show, and clips of it circulate on soundboards as a compact reaction for disbelief. Chinese speakers use the wording casually among friends, which helps explain why the recording feels spontaneous instead of performed. Shared in chats and short videos, it became a shorthand for I know you are joking without needing a long reply. Its short length and clear emotional tone keep it useful across edits, memes and livestream moments where a playful accusation fits.