Verb
To fire a gun.
(idiomatic) To commit to a course of action.
(soccer, idiomatic, intransitive) To shoot, kick the ball in hope of scoring a goal.
(tennis, informal) To hit a very powerful shot.
Source: en.wiktionary.orgI say a murder is abstract. You pull the trigger and after that you do not understand anything that happens. Jean-Paul Sartre
But you come to a point in your life when you can't pull the trigger anymore. Evel Knievel
Next in importance to having a good aim is to recognize when to pull the trigger. David Letterman
Yes, people pull the trigger - but guns are the instrument of death. Gun control is necessary, and delay means more death and horror. Eliot Spitzer
You never pull the trigger until you know you can win. Roger Ailes
They're the Federal Energy Regulatory Commission, and they will not do that. They will not pull the trigger. Gray Davis