"Passive buffs" refer to enhancements or improvements that are automatically activated or applied without any action or input from the player or user. Full definition
Finally, there's the tactician specialist, bestowing passive buffs as they kite swarms of Genestealers to their doom. (pixeljudge.com)
Weapons that fit into the «technical» category are a little trickier to handle — but they have some very impressive results, with huge damage output and in one instance some significant passive buffs for the rest of your team while the weapon is in use. (vg247.com)
For instance, Ken now gets a badass powered - up Shoryuken and Chun - Li can fry opponents with a huge Ki energy ball, where both fighters had relatively unexciting passive buff V - Triggers before. (wccftech.com)