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When a guy is about to hook up with a girl but is thwarted by a locked door that prevents him from entering his apartment/house and there is no one else around to unlock it.
Guy 1: "Man I was about to hook up with this hot chick last night, but I forgot my key and couldn't get into my apartment."
Guy 2: "Dude you totally got lock-blocked!"
by Petey12 September 27, 2013
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when someone thwarts your plan to dye hair.
"dude! i wanted to dye hair yesterday and you wanted to go clubbing! you totally lock-blocked me!"
by raychelle July 10, 2008
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the phenomena occuring when a female bends over and reveals what would normally be clevage, which is instead blocked by her locks of hair falling down over her shoulder
Dude look at Amy try to get that notebook out of her backpack

Oh Swee- damnit man im getting lock-blocked
by eggz09 April 20, 2011
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