Hair Trigger Definition
hârtrĭgər
noun
A trigger so delicately adjusted that a very slight pressure on it discharges the firearm.
Webster's New World
adjective
Responding to the slightest provocation or stimulation.
A hair-trigger temper; a hair-trigger reaction.
American Heritage
Set in motion or operation by a very slight impulse.
Webster's New World
Unstable, in a situation that could be worsened by the slightest mistake.
Wiktionary
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