An incredibly rich chocolate confection, sold only around Easter time, but available very cheaply immediately thereafter. It is a foil-wrapped chocolate ellipsoid which contains some sort of creme inside. Available in a few flavors (including chocolate creme and caramel), and distributed in the United States by Hershey's Foods.
Often sold individually, but also sold in variety packs of 12 to 18 eggs for the true chocoholic. Very hard to eat at first, as you must take care not to spill sticky creme all over yourself.