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2.
a cock block by proxy.

to cock block on behalf of a friend to maintain his anonymity.

"dude, some guy is hitting on that girl i like! i need you to prock block for me."
by newsgroup April 22, 2007
 
1.
to use another to prevent someone you don't like getting some pussy.
"that dickhead, i'm gonna get his mate to prock block him"
by kakaBOOOOOOOOOOOM April 25, 2007