An itchy trigger finger noun phrase
If someone has an itchy trigger finger, they are inclined to shoot a gun at someone else without any good reason or unexpectedly.
Hundreds of people were feared dead when two men with itchy fingers stood up and called themselves the terrorists.
Fearful of thugs with itchy fingers roaming the street at night, I seldom go out after dusk.
If someone has an itchy trigger finger, they tend to act without thinking about the possible results of their actions.
John has an itchy finger, and therefore he is always coming to regret his action in the end.
My mom warned me about my itchy trigger finger, but I didn't care much about it until recently have I realized that what she said was true.
The origin of this phrase is not clear.