A shortened, slang version of penis. Meant to be in the style of ridiculous 1980s slang most likely said by some in the Valley of California.
Origin: South Side of Chicago neighborhood Mount Greenwood
Origin: South Side of Chicago neighborhood Mount Greenwood
by Dave Losso December 5, 2007

by Spider May 13, 2005

by Nikobr020701 December 2, 2015

It's a nickname for niall horan from one direction. Fans call him ni somethimes because it sounds cute :) stream heartbreak weather y'all!!
by louisthesun January 13, 2021

Ni is anything you want it to be. First popularized by Ryan, it's a rising phenomenon. Ni can be a positive, negative, or sad exclamation, or substituted for pretty much anything.
by nilove2011 December 22, 2008

by j0ey August 8, 2003
