“Mrs. Claus” (*1/2 out of four) was a dumb-and-dumber horror thriller about a group of college students and bad actors (Ryan Poole, Brinke Stevens, Kaylee Williams, and others) attending a Christmas party at a sorority house and find that the party is crashed by a serial killer dressed up as (you guessed it) Mrs. Santa Claus. Film mentions “Silent Night, Deadly Night” a few times so that can justify ripping that movie off but while we’re at it- the movie this really rips off is “Black Christmas.” Watch either of those (or their remakes) before wasting your time on this derivative gorefest. Final showdown is particularly stupid and hard to watch.