The term 'JUICES (UP)' can be broken down into two crossword solutions: PEPS (4 letters) and FUELS (5 letters). PEPS is a brand of soft drink produced by the PepsiCo company, which was first introduced in the United States in 1893. It is known for its bright colors and sweet taste. FUELS is a type of energy source, such as gasoline, diesel, or coal, that is used to power vehicles and other machinery. Both PEPS and FUELS are forms of energy that can be used to 'juice up' an engine or other device.