The act of giving a "noob" a dirty sanches, or can also be considered to be used as a word to explain an orgy between 3 or more guys together at the same time. Can also be used as a term for some one who practices "bestialy/beastality".
Ex. When I got home last night, my dog came up to let me pet him, so I gave him an ivenator in the face...
Ex. Last week I walked in on a man doing the ivenator with other men!!!!!
Ex. The other day, I was giving this chick an ivenator "dirty sanches".