Definition

A playful, low-stakes teasing interjection used when someone does something mildly dumb but not worth a full roast. It's the vocal equivalent of a friendly eye-roll.

Example Usage

My friend forgot his keys for the third time this week, and I just said 'Neen' instead of actually calling him out.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=neen&defid=849954)