Harmonicians 

A secret organization for Harmonica players.

Those are some stupid Harmonicians.

Harmonicians by Chavo596 April 27, 2009

harmonians 

People who advocate a romantic relationship between Harry and Hermione in the Harry Potter series. See also "delusional."

The Harmonians were highly depressed and a little hysterical when they were proved wrong by canon.

harmonians by Callio September 1, 2005

Dualing Harmonicas 

The act of two women performing oral sex on a man, while both women slide their lips up and down parralel sides of the shaft.

That threesome was crazy, jill and leilani went dualing harmonicas on me!

Dualing Harmonicas by johnny longshanx March 28, 2011