Sociological Images posted this cool video explaining the Bechdel Test for movies.
What is the Bechdel Test?
"The Bechdel Test, sometimes called the Mo Movie Measure or Bechdel Rule is a simple test which names the following three criteria: (1) it has to have at least two women in it, who (2) who talk to each other, about (3) something besides a man. The test was popularized by Alison Bechdel's comic Dykes to Watch Out For, in a 1985 strip called The Rule." (Video after the jump because I can't resize it.)