double Dutch

Etymology
From +. For sense 1: Dutch (which historically had a wider meaning) as a foreign language was not easily understood, so anything completely incomprehensible would be double Dutch, i.e. twice as hard as Dutch. Sense 2 expands on this meaning.

Noun

 * 1) Incomprehensible language.
 * 2) A language game akin to pig Latin.
 * 3) A game of jump rope with two ropes and frequently two jumpers.
 * 4)  Sex using a condom and the contraceptive pill at the same time.

Translations

 * Bulgarian: неразбираем език
 * Dutch: ,
 * Finnish: ,
 * French:
 * German:
 * Greek:
 * Hungarian:
 * Italian: ,
 * Polish:
 * Portuguese:
 * Russian: ,
 * Turkish:, ,