The Grump (Finnish: Mielensäpahoittaja) is a 2014 Finnish comedy film directed by Dome Karukoski, in which the main character is The Grump, a cranky old man, created by the Finnish author Tuomas Kyrö.

The Grump was selected to compete for the Contemporary World Cinema section at the 2014 Toronto International Film Festival. It is based on a 2014 novel by Kyrö, the third volume by the author, in which this character appears.

The film stars Antti Litja as Mielensäpahoittaja a.k.a. the Grump, Petra Frey, Mari Perankoski, and Iikka Forss. The film tells the story about a stubbornly traditional eighty-year-old farmer — whose social attitudes verge on the prehistoric — raises hell when he is forced to move in with his sadsack, city-dwelling son and successful daughter-in-law.