To give someone a "gretz-ing" is to let someone know they are retarded/ or have done something that makes them look retarded. Based on a early 80's public service commercial featuring Wayne Greztsky and a mantally handicapped teenager.
Scratch the side of your head really fast like you have fleas and exclaim to the nearest stupid person "Gretz!"
by battlebran July 1, 2009
by BlumFreehauf...Ski June 15, 2017
by BlumFreehauf...Ski June 15, 2017
by Terry Myst July 12, 2022