A slam hog is a larger than average woman that a male decides to take down simply because she is present, has a heartbeat, and is currently spreading her legs. Often the next morning said male will claim that he was "taking one for the team" when in actuality he was simply trying to get his rocks off. He will then swear his friends to secrecy.
Goddam Patrick! There was no need to hit that slam hog last night ... we're on Ratio Island - there are hotties everywhere!