The crossword solutions for the term 'THAT'S DELICIOUS!' are YUM (3 letters) and MMMM (4 letters). YUM is an expression of pleasure or delight, usually used when tasting something delicious. MMMM is an expression of pleasure or delight, usually used when tasting something delicious, but with more emphasis than YUM. Both expressions are often used to express appreciation for a tasty food or drink.