![on one's say-so on one's say-so](https://www.tekportal.net/wp-content/uploads/2018/12/on-ones-say-so.png)
According to one’s authority, as in I’m reorganizing the files on the boss’s say-so, or You can skip the exam? On whose say-so? The noun say-so, dating from about 1630, originally meant simply “saying something,” that is, an assertion (without authority or proof). By the early 1800s it had acquired its present meaning.