The jabberwock, J, is a monster in NetHack (originating from the poem Jabberwocky by Lewis Carroll). It hits very hard and can catch unwary adventurers off guard with its extremely high damage, but are sure to be killed in one hit by Vorpal Blade.
Jabberwocks are occasionally enlisted as steeds due to their potential for causing damage. They can also fly.
Encyclopedia entry Edit
"Beware the Jabberwock, my son!
The jaws that bite, the claws that catch!
Beware the Jubjub bird, and shun
The frumious Bandersnatch!"
He took his vorpal sword in hand;
Long time the manxome foe he sought --
So rested he by the Tumtum tree,
And stood awhile in thought.
And, as in uffish thought he stood,
The Jabberwock, with eyes of flame,
Came whiffling through the tulgey wood,
And burbled as it came!
One, two! One, two! And through and through
The vorpal blade went snicker-snack!
He left it dead, and with its head
He went galumphing back.