double-Dutch
From Longman Dictionary of Contemporary EnglishRelated topics: Other gamesdouble-Dutchˌdouble-ˈDutch noun [uncountable] 1 British English informalUNDERSTAND speech or writing that you cannot understand SYN nonsense2 American EnglishDGO a game in which one child jumps over two long ropes that are being swung around by other children