I have no idea what this means

Said a quoo to a quaigh
"Is it harder to quee,
Or to quaggle two quiddlies to quab?"

Said the quaigh to the quoo,
"Not at all, my dear sir,
It's just like a door and a knob!"

"But what if your quiddlies don't quabble?"
Continued the querulous quoo.
"Or even - Great Quidnunc! - they quaggle?"

"Your quibbles are welcome, dear quoo,"
Orated the orgulous quaigh.
"'Twould be like tails teaching doggies to waggle!"

Said the quaigh to the quoo
As they went on their way
"And why must we query the quist?"

"Because," quoth the quoo, with an elegant mew
"It concerns me and you,
As a vale concerns mist,
As a mill concerns grist,
And exactly as Franz concerns Lizst."

***

(It kept me entertained at lunch, at least. )