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2.
In times of war, exhausted combat soldiers requiring brief periods to rest and recover are removed from the field of combat to a place of relative safety and security. The military term, Stand Down, is used for such an action.
Stand down, geek! Stop playing Super Mario on the front lines!
by ProStaff January 26, 2005
 
1.
This is a Military term used to tell a subordinate to shut his pie hole.
Sgt.: Sir,I believe you are an Imbecile, Lt.
LT: You better Stand Down or I will have you standing tall before the man, Sgt.
by Mojo Maniac July 21, 2008
 
3.
To hold a competition between another person in a bathroom stall to see who will leave first when needing to drop a deuce.
Tracy sat quietly on the toilet waiting for the mystery person two stalls over to leave before takin a poo. The mystery pooper wouldn't leave. He, too, was waiting for Tracy to leave so HE could start the coal train. 5 minutes passed. All was quiet except for the occasional nose blowing to pass the time. ...enter the standdown...

Would anyone finally give up and leave?
by jdink August 11, 2010