This is where you discover some one with their chin up and you proceed with a karate chop to the neck while shout "open neck!" The person doesn't have to be with their chin up, they just need chin high enough to fit a flat hand in. You cannot "open neck" some one if they know you are going to do it or if they have their chin down a considerable amount. The whole idea about the "open neck" is supposed to be a suprise with a choke. Be careful if you decide to play this game, because it can keep going on for years to come.
"Hey, look at Shaun sitting there staring at the computer." *Nick creeps slowly behind Shaun, then moves to the side of him...*
"Open Neck!!!"
*BAM*
Shaun: "Uuuugh, you smashed my throat"
by Nicholas Q August 25, 2006
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This phrase is typically said in a mugging in which the mugger will politely ask for your necklace or chain
"Ayyo Open Up Yo Neck!" *steals chain*
by Muggers anonymous September 6, 2020
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A National Holiday where you slap people's necks on April 21.
Josh got his neck slapped on National Open Neck Day.
by liquid19 April 21, 2022
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