1.
a number of official rules and regulations which seem unnecessary a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie
2.
a very special and happy occasion a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie
3.
to be very good at gardening a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie
4.
very, very infrequently a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie
5.
to be very jealous of somebody a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie
6.
something that takes the attention away from the subject being discussed a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie
7.
the person in the family who is thought of as being very bad/naughty a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie
8.
to say something which is not true because you do not want to make the person unhappy a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie
9.
something which cost a lot of money but isn't really very useful a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie
10.
unexpected a red herring a red letter day a white elephant once in a blue moon out of the blue red tape to be green with envy to be the black sheep to have green fingers to tell a white lie