Wait for the cat to jump
If you wait for the cat to jump, or to see which way the cat jumps, you delay taking action until you see how events will turn out
Example: Let’s wait for the cat to jump before we decide
Walk on air
When you are happy and excited because of a pleasant event that makes you feel as if you are floating, you are walking on air
Example: Sophie has been walking on air since her painting won the first prize
Watch one’s step
If you tell someone to watch their step, you are advising them to be careful how they behave or speak in order to avoid getting into trouble
Example: There is zero tolerance in this school for bad behavior so watch your step
While the going is good
If you take an action while the going is good, you do something before the situation changes and it becomes impossible
Example: There’s a 50% discount on subscriptions this month. I think I’ll subscribe while the going is good
Window shopping
When people go window shopping, they look at things in shop windows, without actually purchasing anything
Example: I haven’t been paid yet, so I can only go window shopping
Writing on the wall
This expression refers to a situation in which there are signs showing that a problem is going to occur
Example: We all knew that Tom was going to lose his job, but Tom refused to see the writing on the wall