The shallog spell when boredom looms
'Snot lessened by dull dimpid coves.
Beheaded subject in the nooms
Inadequately shroves.

"But now a case commences, John!
With bombs affixed to victims snatched!
Ingenious puzzles just for me!"
The frumious Cumberbatch.

I take my Strad in hand to rile
The lardmin who inchuffles cake,
Dismissively rebuff in style;
I've glebious plans to make.

While addabatly stopping crimes,
I disregard extraneous grief;
Ferriatant Jim with clubber's eyes
Commands my thoughts in chief.

Misunderstanding, John departs
While Jim skurdankles at the pool.
He's kidnapped John! He'll shoot us both!
I look to John and—


Here are some definitions to be getting on with... (I may or may not do a Humpty-Dumpty style commentary later on):

"shallog" is the word for the exact moment when boredom compels you to shoot at the wall

"dimpid" means "dim and stupid"

"nooms" is a word for "that which looms whitely with no room to the sides and no room to the stern"

"lardmin" are "lard-laden vermin"