
Yummy
Context Matters
Use 'yummy' when talking about food, usually in casual settings with friends or family, not in formal situations. 
Not for Dislikes
'Yummy' should be used only for things you think taste good, not things you dislike or are unsure about. 
Children's Vocabulary
'Yummy' is often associated with children or used when speaking to children but adults use it too. 