the use of a comma, rather than a semicolon, colon, or period, to separate related main clauses in the absence of a coordinating conjunction: often considered to be incorrect or undesirable, especially in formal writing.
Origin of comma fault
First recorded in 1930–35
Also called comma splice.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019