Netflix And Chill Meaning

(slang) Sexual intercourse.

Example: 2015, Greg Figueroa, The Unwritten Rules of Dating[1], page 7:
  Sometimes people aren't available for a rousing night of "Netflix and chill." - Can't change someone or fix them. People are who they are, especially as they get older.
  Hello, sweetheart, it's me. You want to come over tonight for some Netflix and chill?