Pump Up the Volume is a phrase that has been used in popular culture since the 1980s. It is often used to describe the act of increasing the volume of music or sound. The term is also used to refer to the act of motivating and encouraging someone to do something. The crossword solution for the term Pump Up the Volume is AMP, which stands for Amplifier. An amplifier is an electronic device that increases the strength of a signal, such as sound, before it is sent to a speaker.