Gamahouche

Gamahouche or gamahuche.   I came across this archaic term in, unlikely though it is, a modern urban murder mystery by highly lauded novelist Lawrence Block (in Burglars Can't Be Choosers, 1977).

It seems to be a Victorian term for cunniligus:

I was sliding the final drawer back in the desk when Ray asked, "What the hell does gamahouche mean?"

I made him spell it, then took the book away from him and looked for myself.  "I think it means to go down on a girl," I said.

I find it on the web at this Fark discussion, the Urban Dictionary of all things (it's usually a source for invented silliness or poorly written insults), the Wiktionary, and this rather steamy Victorian novel.

I shall endeavor to insert this word (heh heh) into modern parlance as often as mores allow.

Its etymology is unclear.