1 definition by LMaoXDZedong

NIW

NIW/niw - meaning "No Idea When"/"No indication when"/"Not Indicative When" ; it can also be used with the other abverbs: where, who and why, with the following changes respectively: niwR, niwH niwY.

Although it's mostly used with when

A: Niw dude, she left me hanging
B: Cool story, bro!

by LMaoXDZedong July 1, 2021