Having control of the situation. Being the best at somthing. Not worried about somthing.
Brad: "How are you doing in that poker tournament?"
MikeRizz: "I got that shit on lock."
by Michael Rizzuto May 3, 2008
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The appropriate response to a forum/message board topic thread that is of no use to anything. It consists of no content worthy of reading, teal deers, and self pictures that make you want to throw acid in your eyes. Also, in general the OP is a giant faggot.
OP: "Hey guiz, post what Urban Dictionary Says about your name! Come on, it will be fun!"
Response: "Shit thread lock and b&"
by David D Davidson Jr. July 15, 2010
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its when you are going to take a shit but you have to stop on the way to tighten you asshole to keep the shit from coming out.
i was going to shit when i became shit locked and had to stop in the middle of the hall at work
by Richie1966 February 19, 2009
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A piece of doo doo placed on a personal object to deter theft.
"The thief was deterred when he smelled the stench of my shit lock."

"Don't take that! It's been shit locked!"

"I forgot my bike lock, but luckely I never leave home without my shit lock."

"Some people hide their keys... I just put shit on things. That is a shit lock."
by Circus Freak January 9, 2010
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Dred locks that look shitty on someone.
Nigga those ain't dredlocks, they SHITLOCKS!
by Joshiro007 February 13, 2003
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when your ass hair grows out nappy and forms dreadlocks, therefore collecting shit on them
man i havent shaved my ass in years, yesterday i checked out my ass, and i found shit-locks
by two.one.five November 30, 2009
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For people who talk shit on the Internet because their keyboards are stuck on shit.
You should really put the shit lock off on you keyboard because you are talking bull!
by Acousticsman July 11, 2009
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