It’s about some people who used to go to school together. They get invited to a birthday party in this building where one or more floors are under construction or abandoned or something. And then they all start dying one by one. The murderer is a famous chef who used to be fat and these people used to bully her in school. And this was her revenge or something…
The Cook (2008)?
https://www.imdb.com/title/tt0918627/?ref_=fn_tt_tt_8
No, sorry. The killer is supposed to be a woman.
Steel Trap (2007)?
http://irememberthismovie.com/does-anyone-know-the-name-of-this-movie/
Yes! That’s it. Thank you!
You’re welcome : )
Solved!