'say-so' definitions:

Definition of 'say-so'

(from WordNet)
noun
One chap's arbitrary assertion
noun
An authoritative declaration [syn: pronouncement, dictum, say-so]
noun
The power or right to give orders or make decisions; "he has the authority to issue warrants"; "deputies are given authorization to make arrests"; "a place of potency in the state" [syn: authority, authorization, authorisation, potency, dominance, say-so]