Definition from Wiktionary, the free dictionary
- To toss up the head frequently, as a horse to avoid the restraint of the bridle.
From Michael Chack, an American figure skater whose bronze medal winning performance at the 1993 US National Championships was not broadcast on televsion because the producers did not think he would win a medal.
- (ice-skating) To not broadcast a medal-winning or otherwise memorable or crucial figure skating performance. This only occurs in a live broadcast because the network has to decide which programs to show and which to cut in the interest of time. If a skater is low in the rankings and several big names are set to skate later, that performance may be cut.
- 1998: Louis Epstein, US National Men's Final RESULTS in rec.sport.skating.ice.figure 
- Michael Chack pulled WAY up in the standings in his long [skate event]...but was chacked while we saw five guys skate worse!!
2002, Jonas, International Skating Union Discussion Boards: Figure Skating: Yukari Nakano, the reigning world jr silver medalist, landed a triple axel:
- I'm hoping ABC doesn't chack her performance...how could they??
- 2004: Rex, The Rest of Skate Canada: Phaneuf Rocks! The First Time I saw the Two Canadian Pairs Skate! in rec.sport.skating.ice.figure 
- Did they chack Kostner's skate because of the fluff piece on the Russian pairs or not? I kind of like her and wanted to see her.
- 1998: Louis Epstein, US National Men's Final RESULTS in rec.sport.skating.ice.figure