1. hair trigger - Noun
2. hair trigger - Adjective
a gun trigger that responds with little pressure
Source: WordNethair-trigger
Precision of communication is important, more important than ever, in our era of hair trigger balances, when a false or misunderstood word may create as much disaster as a sudden thoughtless act. James Thurber
The rhetoric on the Hill is getting very heated and it's getting quite dangerous. The gun is at the head of the American economy and Congress is holding it and its got a hair trigger. We've got to pay our bills. Peter Welch
Other studies have suggested trauma, illness or surgery can sensitise certain regions of the brain, setting up a hair-trigger inflammatory response which can lead to mood disorders and cognitive decline. Source: Internet
Broken or worn parts in the trigger, sear or hammer/striker may have given the firearm a "hair trigger" (a very sensitive trigger). Source: Internet
He's also got hair-trigger closing speed to finish around the corner and in pursuit. Source: Internet
The model was later taken off the market because of its "hair trigger". Source: Internet