To see or hack Mucus in your fantasy speaks to purging and discharging of smothered musings. You feel you can communicate. On the other hand, the fantasy infers that something or somebody is attempting to keep you down.

To see or cough mucus in your dream represents cleansing and releasing of suppressed thoughts. You feel you are able to express yourself. Alternatively, the dream implies that something or someone is trying to hold you back.