Definitions by Omnious101

HNNG 

Hnng is something said to a person at Omegle to know whether that person has a Tumblr or not.

You: HNNG
Stranger: example.tumblr.com
You: This is mine example.tumblr.com
Stranger: Fuckin' cool dude

HNNG by Omnious101 May 19, 2010