Jabberwock
From Warhammer - The Old World - Lexicanum
Jabberwocks are strange and ugly creatures of Chaos. These large monsters are not very intelligent, but through their size - usually over 12 feet high - and aggressive and fearsome opponents. They are bipeds, although their arms are often used to help them walking, much like a gorilla. Most Jabberwocks are not capable to use their wings to fly, but they produce a humming noise by flapping them furiously.
Jabberwocks are poisonous and able to regenerate even serious injuries in the same fast manner as a Troll. Their colour varies, and mutations of all kind are not uncommon.