Top Definition
The act of preventing interaction between one or more females with one or more men prior to any communication between the two groups, thereby negating the need to cock-block them later on, after they have started making moves on the women.
A: Hey man, how were those girls that Johnny showed up with?
B: I don't know, he sat down at a different table, so I couldn't talk to any of them.
A: Ah, dude, that was like a preemptive cock-block.
by Swill128 June 21, 2009
7 Words related to Preemptive cock-block

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