invented by Rayne Summers, main character of the comic "Least I Could Do"
"i dunno, just felt a sharp pain on the back of my head"
"maybe your a victim of generational sodomy"
It is the action of skull-fucking a man so hard that his great grandchildren occasionally reach to the backs of their heads and say "ow"
essentially changing someones genes with your cock
-hundreds of years later-
Some random guy: "Ow! what was that?!"
Random guys friend: "thats generational sodomy!"