Is "on and on and on" an example of polysyndeton?
The opposite of polysyndeton is asyndeton. Asyndetons use commas without coordinating conjunctions.
The most common coordinating conjunctions are: for, and, nor, but, or, yet, so. (You can also use the acronym FANBOYS.)
"On and on and on" utilizes successive coordinating conjunctions and no commas.