One timer
From Academic Kids
A one timer (or one-time) is an ice hockey shot that occurs when a player meets a teammate's pass with an immediate slapshot, without any attempt to control the puck on his stick. An effective one timer requires precise timing on the part of both players involved, especially the shooter. This play often results in a good chance at a goal. The effectiveness of the one timer comes in the speed of the puck after it is slapshot, and also in the sudden change of the puck's direction.
