look up any word, like blumpkin:
 
1.
Acronym for a Grandfather I'd Like To Have.

The GFILTH is an older gentleman that is particularly awesome and would be the best grandfather.

Also known as a fantasy grandfather.
After watching Gran Torino, I just can't stop thinking about Clint Eastwood. What a GFILTH!
by Hanoola February 16, 2010