joker in the pack

== English == === Noun === joker in the pack (figuratively) Something or someone that can change things in unanticipated ways; a wildcard. === Further reading === “joker in the pack”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022. “joker in the pack”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present. “the joker in the pack” in Longman Dictionary of Contemporary English, Longman. “the joker in the pack” (UK) in Macmillan English Dictionary.