Vulgar, nasty, or disgusting. A combination of "fucking" and "raunchy", as in something that would be described as "fucking raunchy."
This expired milk is a bit faunchy.
by Throne Wrestling Federation January 08, 2007
The tornado was extremely faunchy.
by Lyra Silverkara April 29, 2008
The tornado was extremely faunchy.
by Karalizabeth April 29, 2008