Smush Up is a term used to describe the process of combining two or more ingredients together. It is often used in cooking, where it is used to mix together different ingredients to create a new flavor or texture. The term can also be used to describe the process of combining two or more ideas, concepts, or objects together to create something new. The crossword solution for the term Smush Up is MASH, which is an acronym for Mix, Agitate, Stir, and Heat. This is a method of combining ingredients together that involves mixing, stirring, and heating them until they are blended together.