run-on sentence

So called because the sentence runs on beyond the point where it should end.

run-on sentence (plural run-on sentences)

1. Any very long, often also in other ways badly formed or even chaotic sentence.
2. (grammar) A fused sentence, considered ungrammatical because it combines two (or more) independent clauses written as a single sentence, often with only a comma as separator (comma splice), which should be rendered either as separate sentences or as clauses joined more appropriately (such as by a semicolon or by a comma and coordinating conjunction).

• fused sentence