double Dutch 
noun [mass noun]
1British informal Language that is impossible to understand; gibberish: instructions written in double Dutch...
- The rules are as follows: whoever leaves first is a twat, too stupid to realise that you're not a real moviegoer unless you stay for the credits, whether they be in Cantonese or double Dutch.
- To most readers these names are double Dutch, but don't ignore the trend.
- Hazel danced up to the viewing platform, forgetting she didn't have a mathematical mind, and that it would all be double Dutch to her.
2North American A jumping game played with two skipping ropes swung in opposite directions so that they cross rhythmically.It was a time when racial discrimination wasn't as subtle, when Motown music filled the air, when young girls jumped double Dutch, ate Squirrel Nuts and Brown Cow candies and washed down the sticky sweets with NEHI sodas....
- I used to jump double Dutch when I was your age.
- We were 8 or 9 at the time, and when not jumping double Dutch or playing beauty parlor, Valeria and I would spend hours on the stoop of my family's Brooklyn brownstone swapping elaborate stories about Larry.
- imipramine
- imit.
- imitable
- imitate
- imitation
- imitation is the sincerest form of flattery
- imitative
- imitatively
- imitativeness
- imitator
- imli
- Imma
- immaculacy
- immaculate
- Immaculate Conception
- Immaculate Heart
- immaculate lamb
- immaculately
- immaculateness
- immaculation
- immalleable
- immanacle
- immanation
- immane
- immanence