'Bitter') is a 2009 experimental psychological horror drama film written and directed by Hélène Cattet and Bruno Forzani and starring Cassandra Forêt, Charlotte Eugène Guibeaud and Marie Bos.

[4] Directors Hélène Cattet and Bruno Forzani required more funding outside Belgium and searched for a French co-producer.

[4] The directors found that they only had one third of their original budget, but the producers let them start production regardless based on their experience of making short films for very little money.

[4] Amer had its world premiere at the 2009 Lund International Fantastic Film Festival in Sweden,[5] where it won the inaugural The Blade award.

[7] It was released theatrically in France on 3 March 2010 by Zootrope Films and in Belgium on 28 April 2010 by Coopérative Nouveau Cinéma.

[11] Ella Taylor of the Village Voice gave the film a positive review, stating, "The pleasures of this gorgeous, clever, and visceral film are almost exclusively aesthetic" as well as "that those unmoved or alienated by the porn of pain may be left flopping as nervelessly as one of the movie's severed limbs.