The phrase "batter up" is commonly used in baseball when the player is about to hit the ball. However, there are several synonyms that can be used to describe this action. Some of the common alternatives include "step up to the plate", "take a swing", "grab the bat", "assume the batting position", "ready to hit", "prepare to strike", and "get your stick". These phrases can be used interchangeably to add variety and interest to the language used in a baseball game. So, whether you're a fan or player, it's good to have a few synonyms for "batter up" up your sleeve.