A zonkey is a name for a hybrid offspring of a zebra and a donkey; specifically, a male zebra and female donkey. The offspring of as one of a male donkey and female zebra parents is known as a zedonk. As with most hybrids of the genus Equus, they are sterile.
They tend to look like sleek donkeys with stripes on their legs, necks and backs. While they are not viable, but may be found in the wild due to unintended breedings.
AKA a zebrass; a zonkey is a type of zebroid.