Top definition
When someone prevents, accidentally or intentionally, two people from having a conversation or intercourse. Blocking the cock can be done by jumping into an existing conversation, positioning oneself between two other people, or drawing attention to oneself.
Girl A: Nick and I were talking when Sophia comes over and starts asking me about homework!

Girl B: I know, she's always blocking the cock
by blocking the cock June 15, 2011
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