"Puck drop" refers to the start of a hockey game when the referee drops the puck in the center of the ice for the players to begin play. Full definition
The fans begin showing up in the arena an hour before puck drop and by the time an organ recording of the national anthem clicks on the seats are mostly filled. (sbnation.com)
Team Widen wasted little time jumping out to a lead in both Games and really controlled the Series from the opening puck drop. (allsportsseries.com)
It was all Penguins from puck drop onward, as Justin Schultz got Pittsburgh on the board a minute and a half into the game on the power play. (sbnation.com)