The term "FF" in video games can have two main meanings depending on the context.

Friendly fire is a term that describes situations where a player harms or kills their allies. Some games include the "friendly fire" mechanic as part of gameplay for added difficulty or realism, while other games exclude this possibility to avoid unfairness or griefing.

In another context, "FF" can mean "forfeit," which means to surrender or give up a match. This is usually used in games when a team feels they cannot win or do not want to continue the current game for any reason. Usually, this requires the agreement of the majority or all team members.