"Signs" is a 2002 science fiction thriller film directed by M. Night Shyamalan. The film revolves around a family who discovers mysterious crop circles appearing on their farm, which may be signs of a coming alien invasion. The tagline "It's not like they didn't warn us" suggests that there were indications or messages before the events unfolded.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: See 38-Across. Explanations are generated by AI and may be inaccurate.