double sap

(v) : To click twice on a touchscreen.

(n) : (idiomatic) A tactical shooting technique of pulling the trigger of a weapon twice in quick succession to deliver two shots to the same target zone.

(n) : Two shots or bullets fired in such a way.

(v) : To shoot twice in rapid succession.

(n) : (by extension) A bombing strategy where the same target is attacked twice, with the second attack targeting rescuers and mourners.