seven

be at sixes and sevens (informal)

to be confused or badly organized. We were at sixes and sevens for about a week after we moved in.

See also: six

a nine/one/seven-day wonder

someone or something that causes interest or excitement for a short period but is then quickly forgotten. His music was derided by an older generation convinced that he was a nine-day wonder.

See also: nine, wonder

the seven year itch (humorous)

if someone who is married gets the seven year itch, they become bored with their relationship after about seven years and often want to start a sexual relationship with another person. He keeps talking about all the women he knew before we were married - I think he's got the seven-year itch.

See also: year