I've often wondered if the nonsense words in The Jaberwocky are not some some obscure Victorian slang. In fact, the whole poem sounds suspiciously like a Victorian Canting Song. For example, take a look at "Villon's Straight Tip to All Cross Coves" which is linked below, and note the similarities
http://www.fromoldbooks.org/Farmer-MusaPedestris/villons-straight-tip-to-all-cross-coves.html