Definitions by Expresso_

Grateez 

Used when congratulations just doesn't cut it. Can be used to show mild sarcasm or indifference on the topic being discussed. Not negatively reflecting on the person you are wishing it to.
also see: congratz, gratz.

Grateez mate on getting your new job at MacDonald's!

Grateez by Expresso_ May 16, 2010