he-said-she-said
/ˈhiːsɛdˌʃiːsɛd/adjective
1Designating or relating to a narrative dominated by simple back-and-forth dialogue with attributions.
2 US. Of a dispute: characterized by conflicting statements from opposing parties in the absence of concrete evidence.
noun
US. A contentious dispute in which the parties express opposing accounts of an event or situation; an account of such a dispute lacking analysis or concrete evidence.
Origin
1940s. From he + said, past tense of say + she + said, past tense of say.