To alternately enter and exit, arrive and depart (either physically or figuratively) / To repeatedly appear and disappear; to be transient

A general bustle of activity / (in the plural) The activities of a specified person or group

present participle of come and go

plural of coming and going

(idiomatic) Easily won and easily lost; usually said when resigned to a loss; something that comes in the same way, goes in the same way.

To be unclear about what one is doing; to be bewildered.