When we say that time slips or slides by, we mean that it goes by unnoticed, or without any action being taken to control it. There are many synonyms for this phrase, some of which might include fly by, drift away, pass over, glide past, and slip away. These different phrases can be used to describe a range of different experiences, from a slow and steady flow of time to a sudden rush of events that seem to whisk us away into the future. Whatever the situation might be, it's important to remember that life is short and that every moment counts. Whether we're taking control of our lives or simply letting time slide by, we need to make sure that we're making the most of every opportunity that comes our way.