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1.
smoking large quanities of marijauna, getting extremely pumped up, and physically taking someone to the ground. Often done because someone is being a beta male and needs to be straightened out.
"Holy fuck Blaine, if you don't hit a buck someones going to get jagged the fuck out!"
"You are really testing two jaguars right now by grazing around in the fucking hurt locker"

Moments after Blaine says something beta; "Holy fuck I'm gonna jag out"
by Jaggs April 09, 2010