1> A term used to describe an obese and dirty woman who intentionally gets in the way. Often, Earth Pigs in this context are a little crazy and get in your way because they've decided that a particular public location is now their personal stomping grounds and you're invading that territory.
2> Earth Pig can also refer to the "fat friend" in a group of girls at a bar who is determined to make sure none of the girls get drunk and go off with a guy."
3> Earth Pig can also refer to the fat lady at the office who does nothing, but still doesn't get fired for some reason.
Guy One: "Did you take the picture?"
Guy Two: "No, some Earth Pig wouldn't move her fat ass out of the way."
Guy One: "You've been talking to that chick all night. You gonna take her home?"
Guy Two: "No, that Earth Pig friend of hers has been cock-blocking me all night."
Guy One: "Did Jennifer get that report to you, yet?"
Guy Two: "No, she never does anything but play Solitaire! Why doesn't Mr. Jenkins just fire her?"
Guy One: "Because he's been banging that Earth Pig for the last six months and if he fires her, she'll tell his wife about it!"