A term coined by Fang Langford on The Forge (often simply "No Myth") for a style of play where all setting and situation are left undefined until necessary for the story. e.g. There are no maps, but rather places are invented when needed for the storyline. Instead of background, play is guided by genre expectations.

References:

• I Have Seen El Dorado!
• No Myth playing
• No Myth PCs