double Dutch

double Dutch idiom
  1. Language that cannot be understood, gibberish, as in They might have been speaking double Dutch, for all I understood. This usage dates from the 1870s (an earlier version, however, had it as high Dutch) and is heard less often today than the synonym double talk.
  2. A game of jump rope in which players jump over two ropes swung in a crisscross fashion.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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