It is the mental projection of your digital self.
5 seconds sound clip from the The Matrix movie soundboard.
You can hear this line at 00:40:06 in the Blu-ray version of the movie.
Quote context
[...]
- We can load anything from clothing to equipment, weapons, training simulations... anything we need.
- Right now we're inside a computer program?
- Is it really so hard to believe?
- Your clothes are different, the plugs in your arms and head are gone.
- Your hair has changed. Your appearance now is what we call residual self-image.
- It is the mental projection of your digital self.
- This is the world that you know. The world as it was at the end of the 20th century.
- It exists now only as part of a neural-interactive simulation that we call the Matrix.
- You've been living in a dream world, Neo.
[...]