At any minute is a common expression used to indicate that something is about to happen very soon. It's a versatile phrase that can be used to describe both positive and negative situations. However, there are several other synonyms people can use to convey the same message. These include at any moment, any second now, in a heartbeat, in a jiffy, in the twinkling of an eye, in no time, any minute, any time now, any day now, and shortly. Each of these synonyms adds a slightly different nuance to the expression, but they all imply that something is going to happen soon and people should be ready for it.