Spill dream of spilling something represents feelings about losing control over something you first felt was contained. Embarrassment of losing control of something in your life. Carelessness or an embarrassing display of lacking responsibility. Inconsiderate attempts to control people who end up embarrassing you. Feelings about wasted opportunities.
Alternatively, spilling in a dream may reflect a powerful display of release after a long period of trying to contain something. Letting go of secrets. A powerful display of truth telling.
Example: A man dreamed of spilling a big bowl of soup. In waking life he was trying to control his son and his son humiliated him in front of the whole family.