A slender East African antelope (Litocranius walleri) with a long slim neck and backward-curving horns; called also Waller's gazelle, and in German Giraffengazelle. It feeds on the foliage of bushes and trees, and often stands erect on its hind legs, leaning against the bush, to browse on the higher branches; in this habit it is distinctive and easy to recognize.  [WordNet 1.5]