Limerick

 

https://twitter.com/zachweiner/status/1005146333743808512?s=12

Zach Weinersmith on Twitter twitter.com "There once was a rhymer divine Who perfectly wrought every line Except for the fourth Which was in bad meter and extremely long, and ended without a proper rhyme, which is not what a good limericist should bring forth. Otherwise, they were all fine"