www.alphadictionary.com

Is this word limited to this definition or are we free to use it in a more expanded connotation of any nonsense:

late 14c. (adj.); 1630s (n.), "Any rhyming verse in which the meter is forced into metronomic regularity by the stressing of normally unstressed syllables and in which rhyme is forced or banal"

That seems more technical as if it were an established form of verse like a sonnet. I think of doggeral as informal verse, perhaps dreamed up and tossed off quickly. Perhaps with the light feeling or Robert Service's poems, but not nearly as carefully crafted.