This is the 9119th most frequent French word.
con
"Con" in French is an informal term meaning "idiot" or "fool."
Used informally to describe something foolish or silly.
C'est un con de faire une telle erreur.
It's silly to make such a mistake.
Here, con is used to describe a person being foolish or acting without thinking.
Ne sois pas si con, écoute mon conseil.
Don't be so foolish, listen to my advice.
In this context, con is used to describe the characteristics of the movie as absurd or nonsensical, often in an entertaining way.