Pronounced nnn-ice with a strong emphasis on the rolling N at the beginning. Gnice is used to exclaim absolute joy in a given situation and is usually said at a louder-than-needed voice to ensure everybody knows just how gnice something is. It can also be used as a male greeting call at long distances.
Dude 1- Yo, I finally renewed my Xbox Live Subscription so we can play C.o.D again.
Dude 2- GNICE!!!!!!
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.