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2.
My favorite non-swear word that really isn't one
He`s a real "Father Mocker" that Sean Avery
by Thomas O. December 10, 2008
 
1.
The closest you can get to cursing without actually cursing. Derogatory term for almost anything. Doesn't apply to certain breeds of dogs.
Jon: Did you hear Kelly say father mocker in math today? I thought Mr. Keats was going to explode!

Freida: Yah, but everyone knows Mr. Keats is an ass.

Jon: Yah, he is.
by Jeremykl August 29, 2009
 
3.
An alternative to the offensive "motherfucker". In theory, someone who would mock their father.
I can't believe that fathermocker ate all of my marshmallows!
by Travelshark44 August 22, 2012