The term 'COFFEE, SLANGILY' can be solved by three crossword solutions: MUD (3 letters), JAVA (4 letters), and JOE (3 letters). MUD is a slang term for coffee that originated in the United States in the early 20th century. It is derived from the phrase 'MUD in your eye, ' which was used to describe a strong cup of coffee. JAVA is another slang term for coffee that originated in the United States in the late 19th century. It is derived from the name of the island of JAVA, which was known for its high-quality coffee beans. JOE is a slang term for coffee that originated in the United States in the early 20th century. It is derived from the phrase 'a cup of JOE, ' which was used to describe a cup of coffee.