mc5 - Cleri Who's Who

Four lines rhyming AABB - scansion, rhythm, metre and all that malarkey is as random as-u-like. Oh yes - the featured subject, usually a person, is mentioned in the first line.
Here's a full and frank(ly better) intro by Thos along with some that were made earlier.

Darren

As long as he can pontificate about art made of pubic hair [Rosie/Tuj] It'd be curmudgeonlily anyway.

irach

Niccolo Paganini

I Say, Porter!

Didn't write itsy-bitsy-teeny-weeny-yellow-polka-dot-bikini

Phil

He did, perhaps, have double-jointed fingers [Rosie et al] curmudgeonly is also listed by the OED as an adverb with the qualification that it is rare. Perhaps curmudgeonrily might be a better adverb, as it's based on the act of being a curmudgeon.

Rosie

More use to him than to singers. Invoking The North.