n. A small woodland creature, usually cast from cement or a similar compound. They tend to gather in large groups in trailer parks (specifically on the front lawns), and come in a variety of shapes, sizes, and colors.
"Whoa, check out that thar lawn gnome Billy Bob got.. I wish i could get me one uh them - all green and purty and stuff"
To ring someone's doorbell then run on their front lawn and make a funny face and/or position when they answer the door. Hold that position until they go back inside, even if they yell at you.