Polygaphobia
Intolerant views or speech against those in a polygamous relationship. Often linked to Islamophobia, as bigots won't respect important aspects of their culture. Cuck is a well known slur word against polygamous citizens.
Bill: Ha, that guy is a cuck. He lets his wife stay with Tyrone and Jamal without divorcing her.
Anna: Stop being such a bigot, it's 2017, I can't believe we haven't gotten passed polygaphobia!
Anna: Stop being such a bigot, it's 2017, I can't believe we haven't gotten passed polygaphobia!