Stage 5 Clinger refers to a person of romantic interest, that had taken signals too seriously and became overly attached and clingy.
A person like this can turn from interesting and engaging to intimidating and annoying.
A “stage 5 clinger’s” tactics include texting constantly, calling at the worst moments as well as stalking.
The phrase comes from the 2005 romantic comedy of David Dobkin, titled Wedding Crashers.
The film stars Owen Wilson and Vince Vaughn who are playing divorce mediators who – as the title suggests – crash weddings and try to get laid as much as possible.
In the movie Jeremy, played by Vaughn is together with a terrifyingly attached girl, Gloria, played by Isla Fisher, who is called a “stage 5 clinger”.
Due to the success of the film, the expression caught on in audiences and it was quickly adopted by many.
“Stage 5 clinger” was first defined on Urban Dictionary in 2006, a year after the release of Wedding Crashers and since that time, the phrase had appeared in various contexts online, in articles as well as discussions.