I was prepared to get all esoteric...so maybe I will anyway.

what is a Mudcat?

A mudcat is someone shaking in their boots who sings in public the first time;

A Mudcat is the person who records a sing along and then sends out copies of it to all the attendees;

A mudcat is a man who has warmed the hearts of people enough that when he is ill prayers and good wishes flow to him from around the world - though most of those people have never met him or even spoken with him.

A Mudcat is a dedicated researcher who posts meticulous research on songs or tunes;

A Mudcat is a wise cracking joker who manages to post down home wisdom vieled in humour;

Mudcats are couples who have come together; children born, and Mudcat is final farewells.

Mudcat is a cross section of humanity at its best and sometimes at its worst - it is the mediocre and the sublime, joy and sorrow.