n. the root word probably from dog, applied to bad poetry perhaps with a suggestion of puppyish clumsiness, or being only fit for dogs. 

n. a comic verse of irregular measure; “he had heard some silly doggerel that kept running through his mind”   

adj. (of verse) comic or burlesque, and usually loose or irregular in measure.   

n. Crudely or irregularly fashioned verse, often of a humorous or burlesque nature.  

n. bad poetry 

As you may have noticed, most of my poetry doesn’t rhyme. This is partially because rhyming poems make a reader feel like they should have a meter (like a song), an putting a poem into a rhythmic scheme makes poetry criticism easy, to wit: Even an inexperienced reader with any literary ability is able to easily spot a bad poem of this kind – a doggerel. 

Stated another way, most people can read a poem and see, quite quickly: 

* Words that don’t really rhyme (i.e. attempting to pair up ‘time’ and ‘sign’ for example)

* Phrases that don’t fit the meter

* Phrases that end with a word that is only kept in our lexicon for bad poets. For example, no one ever uses the word ‘Blue’ to mean sad unless they are writing a badly rhyming poem. Same with ‘Forevermore’

* Phrases which meter structure where the wrong syllables of multi-syllabled words are stressed. 

So I, and I recommend this for any lazy poem writer, typically avoid making poems that rhyme. I also suggest, given the definitions above, never describe your poetry as doggerel. 

And if you want to see a good example of non-doggerel rhyming poetry, how about this?