A "taboo topic" refers to a subject or issue that is considered inappropriate, forbidden, or unacceptable to talk about openly in society. Full definition
Dr. Shepherd is an OB - GYN, women's health expert, and founder of Her Viewpoint, an online women's health forum that focuses on addressing taboo topics in a comfortable setting. (healthline.com)
Nazar, 37, says compensation is one of the most taboo topics of conversations in society. (fortune.com)
You would have heard lots of first date rules, such as you should not talk on taboo topics like politics or religion,... (bestinterracialdatingwebsites.com)