Jackalope

jack-a-lope ((jklōp)

noun
1. a mythic North American animal (or "fearsome critter"), described as a rabbit with antlers, often recreated by taxidermists.
The supercilious jackalope caused a wild hullabaloo, by claiming to be related to the pygmy deer and infamous killer rabbits.* 

Synonyms: blutschink, dahu, dilldapp, ellwetritsch, hanghuhn, horned rabbit, rasselbock, wolpertinger.

*It feels wrong to reference killer rabbits without mentioning the Rabbit of Caerbannog and Monty Python.
**Douglas, Wyoming was named "the Home of the Jackalope" because the fearsome critters were first discovered there in 1829. To celebrate their jackalope heritage, the town has erected a jackalope statue and celebrates Jackalope Days in early June.
***Ronald Reagan had a jackalope head mounted in his home, and as a joke in the 1980s, claimed to have hunted and caught the creature himself. The senator of South Dakota, James Abdnor, also gave Reagan and taxidermy jackalope head as a gag gift.