The phrase refers to a calculation tool used within the Old School RuneScape (OSRS) community. This tool estimates the highest possible damage a player can inflict in a single attack, based on their equipment, stats, and the combat style being employed. For instance, a player might use this to determine the optimal gear setup for maximizing damage output when fighting a particular boss.
Accurately determining maximum potential damage is beneficial for efficient gameplay, allowing players to optimize their character builds and strategies for activities like player-versus-monster combat and player-versus-player engagements. Historically, players relied on manual calculations and trial-and-error. The advent of readily accessible calculators streamlined this process, providing a more efficient and accurate method for damage estimation.