Someone don't know their a-hole from a hole in the ground, eh?
"Someone don't know their a-hole from a hole in the ground, eh?"
That's pretty much it. I can understand the word "familial" not being heard correctly, and being confused with "fumarole," but to see it posted that way is really amusing.
That's why, when I'm not sure of something, I hit Google to make sure I know what the heck I'm talking about. I wouldn't want to be accused of having any fumarole deficiencies.