The word "butty" is a colloquial term that is commonly used in the United Kingdom to refer to a sandwich. Although it originated from the phrase "bread and butter", it has a distinct meaning in modern-day slang. There are a few different synonyms for the word "butty", including "sarnie" or "sanger", which are also used to describe a sandwich. Additionally, "sub" or "hoagie" are some other synonyms for this food item that are commonly used in the US and Canada respectively. No matter what term you use to describe it, one thing is for certain: everyone can agree that a good sandwich, or butty, is a delicious and satisfying meal.