Question

Who discovered Abusing Words ?

Answer 1

hahahaha . they naturally came into existence

Answer 2

hey,mate here is your answer✍️✍️✍️

Nothing is invented or developed in days and when it comes to a language it becomes more complex. Language takes time to develop and it is a matter of practice and heritage over a long period.

When I say language, yes abusive words are part of it and they are used to demean the opponent and to express anger, discomfort etc.

However the question here is of origin of the various abusive words so I searched internet and found some valuable findings.

The word "MADAR" in "MADAR C****" means mother in Farsi, so it is clear that they brought this in India. However the other word "BHEN" in the "BC" version of it, is a Hindustani word, BHEN is sister in Hindi.
The origin is somewhere around 1700s.

Abusive words are very common in day to day language here in North.
By North I mean Jammu, Punjab, Himachal, Uttrakhand, UP, Bihar, Delhi, Haryana, Madhya Pradesh. I have lived in almost all of the states mentioned and the abusive words change according to local dialect and language.

For example "Ma-ia-vya" is common in Jammu, Punjabis have a different version of "Boss DK", they use "F*DDI DEYA", some other Punjabi ones are "Gashti deya", "Soori deya", "Bhen Ch***a".

Himachalis don't use the full word "MC", they use "MACHO", Haryanavis use "Bawli Ga**" more often. In west UP "Beti C***" is also used, Beti is Daughter. 
One more word "Jha** ke baal" means "pubic hair" is also a famous one in North specially areas around Delhi.

Nowadays the frequency of using these words have increased dramatically in day to day conversations. I don't know the reason for this though.

Thanks to everyone.

hope it helps you ☺️☺️