Gnome

A Gnome resembles a potato with legs. It is a common garden pest. Gnomes live in gnome-holes underground there they dig up plant roots and generally cause a mess. Since Gnomes are a clear sign that a home belongs to a witch or wizard, the garden must be de-gnomed every so often. To De-Gnome a garden one must grab the Gnomes by the ankle, swing them around a few times, and toss them out of the garden. Gnomes are not very Intelligent, when they realize that a de-gnoming is happing they come out of their holes to watch, making them easier to catch. The Weasley's home the Burrow has a garden with Gnomes, Hermione's cat Crookshanks loved chasing them, and the Gnomes seemed to love being chased.

In the Harry Potter games, Gnomes seem to like Bernie Botts Every Flavor Beans.