nonsentence

noun

non·​sen·​tence ˌnän-ˈsen-tᵊn(t)s 

plural nonsentences

: a word, clause, or phrase that does not form a complete sentence

He talks too fast, strings together endless nonsentences, flubs his lines and ad-libs poorly.

—John W. Mashek

Word History

First Known Use

1933, in the meaning defined above