GNU, n.
An animal of South Africa, which in its domesticated state resembles a horse, a buffalo and a stag. In its wild condition it is something like a thunderbolt, an earthquake and a cyclone.
A hunter from Kew caught a distant view Of a peacefully meditative gnu, And he said: "I'll pursue, and my hands imbrue In its blood at a closer interview." But that beast did ensue and the hunter it threw O'er the top of a palm that adjacent grew; And he said as he flew: "It is well I withdrew Ere, losing my temper, I wickedly slew That really meritorious gnu."
Jarn Leffer
--Ambrose Bierce - The Devil's Dictionary