What does FULLSTERKUR mean? (Pronounced FULL - STIR-KER) There is a legendary feat of strength in Iceland. If you go to Husafell in Iceland there is a field with large stone in it. If you can pick up this stone that weighs 417 lbs and carry it around a goat pen that is 50 meters around, then you have achieved the status of Fullsterkur which is "Full Strong" in Icelandic.