The term snacker can be defined as a person who eats snacks frequently or has a habit of snacking. There are many synonyms that can be used to describe a snacker. One word that is commonly used is nibbler, which refers to someone who eats small amounts of food throughout the day. Additionally, the term grazer is also widely used to describe someone who eats small amounts of food frequently. Some other synonyms for snacker include muncher, chewer, and cruncher, which all describe a person who enjoys snacking on food that requires a lot of chewing. Ultimately, all of these words are used to describe someone who loves snacking and enjoys satisfying their cravings throughout the day.