The Spit
Interpreters have said that spitting in a dream may indicate accusing someone. If the spit is mixed with blood, it might point to unlawful gain. Spitting on a wall could signify spending money in jihad or trade, and on the ground, buying property or land. Spitting on a tree may suggest breaking a covenant or an oath, and on a person, it means accusing them. It was also mentioned that hot spit is a sign of a long life, while cold spit indicates death.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam