Top Definition
(n.) That one person in your life that always seems to keep you from scoring.

(n.)The hypothetical person that keeps your pants on whether you want them there or not.
Guy: Dude, there she is. That girl is fine.

Friend:check it out, her fat friend came too.

Guy: Dammit, who invited catie cockblock?
by Simpleworks March 29, 2010
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