As in, "to be under fire lock." A word used to describe a person who is experiencing the momentary stun one feels at the first blare of a fire alarm.

Seriously, how are you supposed to act calm in an emergency when you seize up and start bleeding from your ears?
*Someone blows out a match in the storeroom, fire alarm sounds*

"Holy shit! I think Jim's heart just stopped!"

*covering ears* "Nah bro, that fuckin' fire alarm just put him under fire lock."
by Gran Torino April 03, 2011

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