Yet another term for anal coitus or butt fucking. The rectum or ass is referred to as the corn hole in some areas of the United States and Western Europe. Blasting is a reference to a hard pounding via the penis.
Q. How was your date with Large Marge last night?
A. It went well, I was Corn Blasting her and got a little Mud on my helment.
I stopped by the nursing home to vist your Granny last week. Fifteen minutes after I got there she wanted me to Corn Blast her. I said only if it is a Filthy Florence.