The meaning of Fast in dream | Dream interpretation
If moving or traveling at a fast speed, your life is full and encompassing many things; there is much for you to learn. Also, slow down and balance your energies.
If you are on a fast, means purification and cleansing; also, self-denial and lack of self-love if carried to an extreme; destructive to physical energy.
Dreams of fasting indicates -discipline.
If you are abstaining from food/thoughts that are unhealthy for you, then this indicates that you are releasing and detoxifying impurities from your system. Releasing what you don’t want so that you can feast on what you do want.
If this dream is about rapid movement, see Fast Lane or Express.