Solanum aethiopicum, the bitter tomato, Ethiopian eggplant, or nakati, is a fruiting plant of the genus Solanum mainly found in Asia and Tropical Africa. It is also known as Ethiopian nightshade, garden eggs, pumpkin-on-a-stick, and mock tomato. It is a popular vegetable in north-east India, and is known as khamen akhaba in Manipuri and samṭawk in Mizo. They are called Titay bii or simply bii in Darjeeling, Sikkim and Nepal and are relished with meat, particularly pork. These names are a result of its varied morphology, with ripe fruit often looking like a cross between an eggplant and a tomato, which are also from Solanum. In fact, the Ethiopian eggplant was so much confused with the ordinary eggplant that this was considered by some a variety violaceum of S. aethiopicum.

Ethiopian eggplant may have originated from the domestication of Solanum anguivi. The scarlet eggplant, also known as Gilo or jiló, was long held to be a distinct species (S. gilo) but is nowadays generally considered to be a cultivar group of S. aethiopicum.

Ethiopian eggplant has been used as a source of disease resistance genes for several commercially grown Solanaceae crops, including Solanum melongena (eggplant). A lack of genomic resources has meant that breeding has lagged behind other vegetables, although a 1.02-Gb draft genome has been sequenced by BGI, with single-nucleotide polymorphisms identified for use by breeders.