(USA) When I used to ask my grandma what was for dinner, she would say 'cat fur and kitty britches'. This was her Ozark way of telling me that I would get what she cooked. (Ozark is a region in the center of the United States)
If people try to fix something after the problem has occurred, they are trying to close the stable door after the horse has bolted.
'Close the barn door after the horse has bolted' is alternative, often used in American English.
If a person said "I hate camping. I don't like giving up my creature comforts." the person would be referring, in particular, to the comfortable things he/she would have at home but not when camping. At home, for example, he/she would have complete shelter from the weather, a television, a nice comfortable warm bed, the ability to take a warm bath or shower, comfortable lounge chairs to relax in and so on. The person doesn't like giving up the material and psychological benefits of his/her normal life.
In finance, if there is small, brief recovery in the price of a stock that has been going down, it is a dead cat bounce. It comes from the idea that even a dead cat will bounce if it falls far enough. It is noiw used for any case where something makes a short, slight recovery during a serious decline.
(USA) (US Southern) This is a response given to an unnecessary question for which the obvious answer is yes. Example: If you were to ask an Olympic archer whether she could put an arrow in an apple at ten yards, she could answer: "Does a one-legged duck swim in circles?"('Do one-legged ducks swim in circles?' is also used.)