An intentionally noncommittal or ambiguous statement WordNet 3.0 & Open English WordNet

In the linguistic sub-fields of applied linguistics and pragmatics, a hedge is a word or phrase used in a sentence to express ambiguity, probability, caution, or indecisiveness about the remainder of the sentence, rather than full accuracy, certainty, confidence, or decisiveness. Wikipedia

Intentionally non-committal or ambiguous sentence fragments Wikipedia Disambiguation

Phrase used to reduce the intensity of something said, like "kinda" or "well, I've heard" Wikidata

A non-committal or intentionally ambiguous statement. Wiktionary

Pragmatics: non-committal statement. Wiktionary (translation)