A secret way of blocking anyone from dating a certain individual.
Professional Cock Block artists have their own secret way of doing things.

They usually do it to be protective of someone they care about.
Person 1: He is such a Professional Cock Block.

Person 2: Well maybe it wasn't meant to be.

Person 1: Be cautious around those Professional Cock Blocks, they know how to trick you.
by DontFeedTheTrolls April 16, 2013

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