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
I looked up his poetry. Interesting stuff, and very fun to read. The glossary shows that most, maybe all, of what he writes makes literal sense, but sounds like nonsense to us because of it makes liberal use of English slang.
OTOH, Lewis Carroll actually invented words with no particular meaning, so his poems are highly connotative, yet there is enough information that they tell a story. In any case, poets like these make poetry FUN!