A creation on the official forums for the 2008 game Spore, invented by member TheLudicrous. It is a plushy-looking, green homicidal rapist. The only way to kill one is to use a bowling ball on it. Its weaknesses are Twinkies, a special doughnut from outer space, and ringtone sensation Crazy Frog. Its enemies are Susan the Anti-Hug Monster, a female humanoid with wings, and Splash Drop, and anthropromorfic rain drop.
Look out for Hug Monsters in your bedroom, they've been known to stalk you there.