The word "taboo" refers to something that is considered forbidden or prohibited by a particular society or culture. It could be a certain behavior, topic, or object that is considered inappropriate or against social norms. Full definition
In its climax, the film happily adds «violence against women» (albeit of the self - defense variety) to the list of taboo subjects it tries to mine for comedy. (film.avclub.com)
It may sound like a gimmick, but this subversive, punkish invention allowed Baselitz to smuggle in taboo subject matter such as Nazi eagle insignia, and so deal with Germany's traumatic past. (telegraph.co.uk)
The characters of Pagnol's brightly lit, mostly outdoor - set tale of taboos in socially conservative Marseille are as marked by anxieties over their placement in surrounding France as their role where they currently reside. (slantmagazine.com)