adverb
about to leave; just as one is leaving
Describes the moment just before departing or starting out. Often used with verbs like 言う, 呼び止める, or 思い出す.
See also: 出掛け (でがけ)
出しなに忘れ物に気づいた。
Just as I was about to leave, I noticed I'd forgotten something.
出しなに一声かけてください。
Please give me a shout before you go.