useless trivia: What Word Means: Nutty?

Questions

When someone is a hanger on or serves no purpose, he is called this?

When someone is clumsy or awkward, especially with their hands, they are often said to be "all ...." These?

When something is completely different it is said to be one of these of a different color?

When the Hoovers did not want to be overheard by White House guests, they spoke to each other in what language?

When two words are combined to form a single word (e.g., Motor + hotel = motel, breakfast + lunch = brunch) what is the new word called?