Power-level

The site, which attracts as many as 1,000 clients per month (including a few celebrities Bartlett won’t name), provides power-leveling services for popular subscription-based online games like City of Villains, Star Wars Galaxies, Lineage II and Dark Age of Camelot.

Source: wiktionary

While the main game [of Disgaea 2] is fun, the true joy is building your characters’ stats. Power-leveling is your only chance at completing the optional side quests.

Source: wiktionary

The Internet Crimes Against Children Task Force has brought into their ranks a teenager named Zach, whose task is to level up characters in online games for the police, who then take those characters on their hunts for predators. Basically, he is “power-leveling” for the police.

Source: wiktionary

There is a bunch of jewelcrafting leveling guides available free on the Net – so don’t pay for one at one of those power-leveling sites.

Source: wiktionary