A perfect specimen is the bit of evidence read by the White Rabbit
at the Trial of the Knave of Hearts.[1] One charm of these verses is
the serious air of legal directness which pervades their ambiguity,
and another is the precision with which the metrical accent
coincides exactly with the natural emphasis. They are marked, too,
by the liquid euphony that always distinguishes Lewis Carroll's
poetry.

A different type is found in verses that refer to objects in terms
the opposite of true, thereby suggesting ludicrous incongruity, and
there is also the nonsense verse that uses word effects which have
been confiscated by the poets and tacitly given over to them.

A refrain of nonsense words is a favorite diversion of many
otherwise serious poets.

With a hey, and a ho, and a hey nonino,

is one of Shakespeare's many musical nonsense refrains.

[Footnote 1: "She's all my Fancy painted him," page 20.]

Burns gives us:

Ken ye aught o' Captain Grose?
Igo and ago,
If he's 'mang his freens or foes?
Iram, coram, dago.
Is he slain by Highlan' bodies?