The term SHOUT, INFORMALLY can be expressed in two crossword solutions: HOLLA (5 letters) and SINGOUT (7 letters). HOLLA is an informal expression used to express excitement or surprise. It is derived from the African-American Vernacular English (AAVE) and is often used as a greeting. SINGOUT is another informal expression used to express enthusiasm or joy. It is derived from the Caribbean English dialect and is often used as a celebratory phrase.