Out-of-character (OOC) refers to any conversation or actions which come from the actual person behind the player character.

These include:

• Talking about the real world
  • "Did you catch the game on TV last night?"
  • "I have to go, dinner is ready."
  • "a/s/l?"
• Talking about game mechanics
  • "I only have 20xp to go til next level."
  • "Should I pick dodge or spring attack?"
  • "I use my longsword most of the time because its +4, but the rapier has a higher threat range."
  • "Haha! You failed your reflex saving throw!"
• Talking about the game itself or about things your character wouldn't know
  • "You have to open his dialog to get the quest started."
  • "Its under 'Special Attacks' on your radial menu."
  • "I remember from chemistry in high school how you make gunpowder."

See also: metagaming