Where someone's head is choped off the amount of time that the head will live which is said to be 13 seconds.
by The Fury 13 December 4, 2010
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noun. from the Latin prefix "head" meaning "body part" and the suffix "touching time" denoting a commonly accepted time where in which one may touch the heads of others in the area along a straight path. Used to denote the opportune time in which one may touch heads, created by Dano Mckenna in the late 90's.
"Bob, it's head touching time"

"Mike, it's head touching time, ballsnasty!"
by Daniel McKenna March 8, 2004
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This is a military term related to ensuring the bolt and head space for the M2 .50 caliber machine gun are in alignment. This must be done correctly, or the weapon can explode during operation. It also means a person who's screwed something up because they failed to check what they were doing before they did it.
Lieutenant Smedlap blamed his mistakes on his platoon sergeant, but it was actually his fault.

"LT Smedlap blamed his sergeant, but it was really a head space and timing problem"
by Soldier online October 23, 2009
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The thoughts that sneak into your head as you try to go to sleep. They are usually negative, irrational and exaggerated, but feel oh-so-real at the time.

In the morning you often can't even figure out what you were worried or angry about.
by MynameisScarlett January 8, 2020
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