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1.
When a woman in on her period (aka "up on blocks"). Similar to "lockdown"
We can't have sex this weekend because my girlfriend is on blockdown.
Por Anthony Gentile 30 de abril de 2007
 
2.
When you block someone on your friends list.
Friend #1: "I'm tired of Joe posting sarcastic messages on my status updates."
Friend #2: "Girl! You need to put him on BlockDown!"
Por Lolita75 16 de enero de 2010