The term 'KEEP IT UP!' can be represented by three crossword solutions: CHIN (4 letters), HIGHER (6 letters), and SOFARSOGOOD (11 letters). CHIN is a noun that refers to the lower part of the face, including the jaw and mouth. HIGHER is an adjective that means greater in amount, degree, or intensity. SOFARSOGOOD is an expression of encouragement that is used to show support for someone's efforts. Together, these three words form a phrase that is used to encourage someone to continue doing something well.