Swear Word Derangement Syndrome
A mental disease where a person can't say any kind of not-so family friendly swear words. It was discovered in the Coloradan city of Denver in October 1940, had no full name and the full term was coined in 1958. This mental disease is also found on families where has their children born with horrific mental health conditions.
The creator of this definition on UD himself has Swear Word Derangement Syndrome. He also can't say swear words on his own films.