Petty quarrels are small disagreements or arguments between two people. They can range from minor disputes to more serious conflicts. Two words that are often used to describe petty quarrels are 'SPATS' and 'TIFFS'. SPATS are short-lived arguments that usually involve a lot of shouting and arguing, but are quickly forgotten. TIFFS are more serious disagreements that can last for days or weeks and can cause long-term damage to relationships.