Floor it is a colloquial term used while driving at high speeds. The term is synonymous with pressing down on the accelerator and speeding up. Alternative phrases to use instead of "floor it" include "step on it," "hit the gas," "pedal to the metal," "go full throttle," and "put the pedal down." These phrases can be used interchangeably and convey the same message. It is important to remember to drive safely and cautiously, especially when using these expressions while driving. These terms are often used in movies, TV shows, and books to add more excitement and energy to high-speed chase scenes.