A specific thing that causes a mentally ill individual's brain to go into a state of hypervigilance. The thing that triggers them makes them feel unsafe and or threatened. Contrary to popular belief, this does not just occur in people with PTSD, though it is much more common in people with PTSD and a type of anxiety disorder.

A trigger is an experience that causes a person to recall a traumatic moment in their life. Often misused by assholes trying to belittle people's horrible experiences.

A person, place, or thing that, due to the strong emotions or memories one associates with it, brings on a sudden, intense craving to use drugs, alcohol, sex, or to engage in other high risk behaviors in order to numb one's feelings. For an addict, this can easily lead to relapse

Clitoris (compare frig)

nickname of Willie Nelson's Martin N-20 Classical guitar, In 1969, Nelson purchased the guitar unseen for $750 in Nashville fom "Shot" Jackson and named it after Roy Rogers' horse "Trigger". The next year Nelson rescued the guitar from his burning ranch & moved back to Texas

In the criminal lexicon "trigger" used to describe a hot-tempered person, fast for killing (without thoughts about consequences). Hi-ranked criminal leaders often call thier enforsers with a word "trigger". In this case "tigger" is the synonym for "soldier" or "killer".