A comma splice is a mistake in writing where a comma is used to connect two complete sentences instead of stronger punctuation like a period or a coordinating conjunction. Full definition
Rowling's prose style, for one, suffers from several basic problems, such as comma splices, mixed metaphors, pleonasms, repetition and stock phrases. (wsws.org)
My head is one long comma splice of to - do lists and I am constantly overriding the least important of tasks to finish. (attachmentparenting.org)
In Kaizena, I created a lesson on comma splices in which I typed a detailed explanation of what they are and how to correct them, as well as a link to a YouTube video about them. (edutopia.org)