A word used to mock stupidity. Originated in Canada in response to a TV commercial depicting a young hockey fan cheering for Wayne Gretsky. Gretsky's last name was slurred by the boy, and he pumped his fist in the air ackwardly. The word and the gesture and both performed to complete the insult.
a man slips and falls on his butt a person sees this and shakes his fist rapidly by his temple and says "Gettsky!"