it certainly is
the last verse is my favourite:

"And, has thou slain the Jabberwock?
Come to my arms, my beamish boy!
O frabjous day! Callooh! Callay!'
He chortled in his joy.

Callooh! Callay! must be is the Woo Yay of its time
( adverse_camber, Mon 13 Jan 2003, 14:54, archived)

I would
like to learn how to chortle in my joy.
Does it require specialist equipment?
( bovine www.richardtingley.co.uk, Mon 13 Jan 2003, 14:57, archived)