General Meanings:

Anger and lost respect In the dream your friend or acquaintance spit, then this dream indicates that your relation with this person based on envy or hostility. In the dream you spit on a stranger, this shows that you have lost respect of yourself.

Traditional Meanings:

European (Judeo-Christian)

• Joy if were spit or spat upon – When you were spit or pat upon you, this dream announces you happiness and success in your life;
• Bad luck and pain if be spit upon by a snake – This dream is a bad sign that you will have misfortune and sorrow in near future.

Arabian (Islamic)

• Good news if you spit – In a dream you spit, then this means that you will get a very good news, which will change your life.

* Please, see meaning of spit on.